Consider an infinite triangle made up of layers. Let's number the layers, starting from one, from the top of the triangle (from top to bottom). The k-th layer of the triangle contains k points, numbered from left to right. Each point of an infinite triangle is described by a pair of numbers (r, c) (1 ≤ c ≤ r), where r is the number of the layer, and c is the number of the point in the layer. From each point (r, c) there are two directed edges to the points (r+1, c) and (r+1, c+1), but only one of the edges is activated. If r + c is even, then the edge to the point (r+1, c) is activated, otherwise the edge to the point (r+1, c+1) is activated. Look at the picture for a better understanding.

<image> Activated edges are colored in black. Non-activated edges are colored in gray.

From the point (r_1, c_1) it is possible to reach the point (r_2, c_2), if there is a path between them only from activated edges. For example, in the picture above, there is a path from (1, 1) to (3, 2), but there is no path from (2, 1) to (1, 1).

Initially, you are at the point (1, 1). For each turn, you can: 

  * Replace activated edge for point (r, c). That is if the edge to the point (r+1, c) is activated, then instead of it, the edge to the point (r+1, c+1) becomes activated, otherwise if the edge to the point (r+1, c+1), then instead if it, the edge to the point (r+1, c) becomes activated. This action increases the cost of the path by 1; 
  * Move from the current point to another by following the activated edge. This action does not increase the cost of the path. 



You are given a sequence of n points of an infinite triangle (r_1, c_1), (r_2, c_2), …, (r_n, c_n). Find the minimum cost path from (1, 1), passing through all n points in arbitrary order.

Input

The first line contains one integer t (1 ≤ t ≤ 10^4) is the number of test cases. Then t test cases follow.

Each test case begins with a line containing one integer n (1 ≤ n ≤ 2 ⋅ 10^5) is the number of points to visit.

The second line contains n numbers r_1, r_2, …, r_n (1 ≤ r_i ≤ 10^9), where r_i is the number of the layer in which i-th point is located.

The third line contains n numbers c_1, c_2, …, c_n (1 ≤ c_i ≤ r_i), where c_i is the number of the i-th point in the r_i layer.

It is guaranteed that all n points are distinct.

It is guaranteed that there is always at least one way to traverse all n points.

It is guaranteed that the sum of n over all test cases does not exceed 2 ⋅ 10^5.

Output

For each test case, output the minimum cost of a path passing through all points in the corresponding test case.

Example

Input


4
3
1 4 2
1 3 1
2
2 4
2 3
2
1 1000000000
1 1000000000
4
3 10 5 8
2 5 2 4


Output


0
1
999999999
2
import java.io.*;
import java.math.BigInteger;
import java.util.*;


public class Main {
	public static void main(String[] args) throws IOException {
		InputStream inputStream = System.in;
		OutputStream outputStream = System.out;
		PrintWriter out = new PrintWriter(outputStream);
		InputReader in = new InputReader(inputStream);
		
//		for(int i=4;i<=4;i++) {
//			InputStream uinputStream = new FileInputStream("timeline.in");
			//String f = i+".in";
			//InputStream uinputStream = new FileInputStream(f);
//			InputReader in = new InputReader(uinputStream);
//			PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("timeline.out")));
//		}
		Task t = new Task();
		t.solve(in, out);
		out.close();
	}	
	
	static class Task{

		public void solve(InputReader in, PrintWriter out) throws IOException {
			int c = in.nextInt();
			while(c-->0) {
				int n = in.nextInt();
				int rr[] = new int[n+1];
				int cc[] = new int[n+1];
				rr[0] = 1;
				cc[0] = 1;
				for(int i=1;i<=n;i++) {
					rr[i] = in.nextInt();					
				}
				for(int i=1;i<=n;i++) {
					cc[i] = in.nextInt();
				}				
				item[] arr = new item[n+1];
				for(int i=0;i<=n;i++) {
					arr[i] = new item(rr[i],cc[i]);
				}
				Arrays.sort(arr);
				int ret = 0;
				for(int i=0;i<arr.length-1;i++) {
					ret += get_dist(arr[i],arr[i+1]);
				}
				out.println(ret);
			}			
		}
		class item implements Comparable<item>{
			int r,c;
			int lvl;
			public item(int a,int b) {
				r = a;
				c = b;
				lvl = (r-c)/2;
			}
			@Override
			public int compareTo(item t) {				
				return this.r-t.r;
			}			
		}
		
		int get_dist(item a, item b) {
			int r1 = a.r;
			int c1 = a.c;
			int r2 = b.r;
			int c2 = b.c;			
			int l1 = (r1-c1)/2;
			int l2 = (r2-c2)/2;
			int d = 0;
			if(l1!=l2) {
				int nr = c2%2==0?c2+1:c2;
				d += (r2-nr)/2;
				r2 = nr;
			}
			if((r2+c2)%2==0) {
				d+=r2-r1;
			}
			return d;
		}

		private static int combx(int n, int k) {
			int comb[][] = new int[n+1][n+1];
			for(int i = 0; i <=n; i ++){
				comb[i][0] = comb[i][i] = 1;
				for(int j = 1; j < i; j++){
				comb[i][j] = comb[i-1][j] + comb[i-1][j-1];
				comb[i][j] %= 1000000007;
				}
			}
			return comb[n][k];
		}


		
		class trie_node{
			boolean end;
			int val;
			int lvl;
			trie_node zero;
			trie_node one;
			public trie_node() {
				zero = null;
				one = null;		
				end = false;
				val = -1;
				lvl = -1;
			}
		}
		class trie{
			trie_node root = new trie_node();			
			public void build(int x, int sz) {
				trie_node cur = root;				
				for(int i=sz;i>=0;i--) {
					int v = (x&(1<<i))==0?0:1;
					if(v==0&&cur.zero==null) {
						cur.zero = new trie_node();
					}
					if(v==1&&cur.one==null) {
						cur.one = new trie_node();
					}
					cur.lvl = i;
					if(i==0) {
						cur.end = true;
						cur.val = x;						
					}else {

						if(v==0)
							cur = cur.zero;
						else 
							cur = cur.one;
						cur.val = v;
						cur.lvl = i;						
					}
				}
			}
			int search(int num, int limit, trie_node r, int lvl) {
				if(r==null) return -1;
				if(r.end) return r.val;
				int f = -1;
				int num_val = (num&1<<lvl)==0?0:1;
				int limit_val = (limit&1<<lvl)==0?0:1;
				
				if(limit_val==1) {
					if(num_val==0) {
						int t = search(num,limit,r.one,lvl-1);
						if(t>f) return t;
						t = search(num,limit,r.zero,lvl-1);
						if(t>f) return t;						
					}else {
						int t = search(num,limit,r.zero,lvl-1);
						if(t>f) return t;
						t = search(num,limit,r.one,lvl-1);
						if(t>f) return t;						
					}					
				}else {
					int t = search(num,limit,r.zero,lvl-1);
					if(t>f) return t;
				}
				return f;
			}
		}
	    public int[] maximizeXor(int[] nums, int[][] queries) {
	    	int m = queries.length;
	        int ret[] = new int[m];
	        trie t = new trie();
	        int sz = 5;
	        for(int i:nums) t.build(i,sz);
	        int p = 0;	        
	        for(int x[]:queries) {
	        	if(p==1) {
	        		Dumper.print("here");
	        	}
	        	ret[p++] = t.search(x[0], x[1], t.root, sz);
	        }
	        return ret;
	    }		

		class edge implements Comparable<edge>{
			int id,f,t; int len;
			public edge(int a, int b, int c, int d) {
				f=a;t=b;len=c;id=d;
			}
			@Override
			public int compareTo(edge t) {				
				if(this.len-t.len>0) return 1;
				else if(this.len-t.len<0) return -1;
				return 0;
			}
		}
		
		static class lca_naive{
			int n;
			ArrayList<edge>[] g;
			int lvl[];
			int pare[];
			int dist[];
			public lca_naive(int t, ArrayList<edge>[] x) {
				n=t;
				g=x; 
				lvl = new int[n];
				pare = new int[n];
				dist = new int[n];
			}
			void pre_process() {
				dfs(0,-1,g,lvl,pare,dist);
			}
			void dfs(int cur, int pre, ArrayList<edge>[] g, int lvl[], int pare[], int dist[]) {
				for(edge nxt_edge:g[cur]) {
					if(nxt_edge.t!=pre) {
						lvl[nxt_edge.t] = lvl[cur]+1;
						dist[nxt_edge.t] = dist[cur]+nxt_edge.len;
						pare[nxt_edge.t] = cur;
						dfs(nxt_edge.t,cur,g,lvl,pare,dist);
					}
				}				
			}
			public int work(int p, int q) {
				int a = p;
				int b = q;
				while(lvl[p]<lvl[q]) q = pare[q];
				while(lvl[p]>lvl[q]) p = pare[p];			
				while(p!=q){p = pare[p]; q = pare[q];}
				int c = p;
				return dist[a]+dist[b]-dist[c]*2;
			}
		}
		static class lca_binary_lifting{
			int n;
			ArrayList<edge>[] g;
			int lvl[];
			int pare[];
			int dist[];
			int table[][];
			public lca_binary_lifting(int a, ArrayList<edge>[] t) {
				n = a;
				g = t;
				lvl = new int[n];
				pare = new int[n];
				dist = new int[n];				
				table = new int[20][n];				
			}
			void pre_process() {
				dfs(0,-1,g,lvl,pare,dist);
				for(int i=0;i<20;i++) {
					for(int j=0;j<n;j++) {
						if(i==0) table[0][j] = pare[j];
						else table[i][j] = table[i-1][table[i-1][j]];
					}
				}				
			}
			void dfs(int cur, int pre, ArrayList<edge>[] g, int lvl[], int pare[], int dist[]) {
				for(edge nxt_edge:g[cur]) {
					if(nxt_edge.t!=pre) {
						lvl[nxt_edge.t] = lvl[cur]+1;
						dist[nxt_edge.t] = dist[cur]+nxt_edge.len;
						pare[nxt_edge.t] = cur;
						dfs(nxt_edge.t,cur,g,lvl,pare,dist);
					}
				}				
			}			
			public int work(int p, int q) {
				int a = p;
				int b = q;
				if(lvl[p]>lvl[q]) {
					int tmp = p;
					p=q;
					q=tmp;
				}				
				for(int i=19;i>=0;i--) {
					if(lvl[table[i][q]]>=lvl[p]) q=table[i][q];
				}				
				if(p==q) return p;// return dist[a]+dist[b]-dist[p]*2;
				for(int i=19;i>=0;i--) {
					if(table[i][p]!=table[i][q]) {
						p = table[i][p];
						q = table[i][q];
					}
				}
				return table[0][p];
				//return dist[a]+dist[b]-dist[table[0][p]]*2;
			}
		}
		static class lca_sqrt_root{
			int n;
			ArrayList<edge>[] g;
			int lvl[];
			int pare[];
			int dist[];
			int jump[];
			int sz;
			public lca_sqrt_root(int a, ArrayList<edge>[] b) {
				n=a;
				g=b;
				lvl = new int[n];
				pare = new int[n];
				dist = new int[n];
				jump = new int[n];
				sz = (int) Math.sqrt(n);
			}
			void pre_process() {
				dfs(0,-1,g,lvl,pare,dist,jump);
			}
			void dfs(int cur, int pre, ArrayList<edge>[] g, int lvl[], int pare[], int dist[], int[] jump) {
				for(edge nxt_edge:g[cur]) {
					if(nxt_edge.t!=pre) {
						lvl[nxt_edge.t] = lvl[cur]+1;
						dist[nxt_edge.t] = dist[cur]+nxt_edge.len;
						pare[nxt_edge.t] = cur;
						if(lvl[nxt_edge.t]%sz==0) {
							jump[nxt_edge.t] = cur;
						}else {
							jump[nxt_edge.t] = jump[cur];
						}
						dfs(nxt_edge.t,cur,g,lvl,pare,dist,jump);
					}
				}				
			}
			int work(int p, int q) {
				int a = p; int b = q;
				if(lvl[p]>lvl[q]) {
					int tmp = p;
					p=q;
					q=tmp;
				}
				while(jump[p]!=jump[q]) {
					if(lvl[p]>lvl[q]) p = jump[p];
					else q = jump[q];
				}
				while(p!=q) {
					if(lvl[p]>lvl[q]) p = pare[p];
					else q = pare[q];
				}
				return dist[a]+dist[b]-dist[p]*2;
			}
		}
		
//		class edge implements Comparable<edge>{
//			int f,t,len;
//			public edge(int a, int b, int c) {
//				f=a;t=b;len=c;
//			}
//			@Override
//			public int compareTo(edge t) {				
//				return t.len-this.len;
//			}
//		}
	
		class pair implements Comparable<pair>{
			int idx,lvl;
			public pair(int a, int b) {
				idx = a;
				lvl = b;
			}
			@Override
			public int compareTo(pair t) {
				return t.lvl-this.lvl;
			}
		}		
		
		static class lca_RMQ{
			int n;
			ArrayList<edge>[] g;
			int lvl[];
			int dist[];
			int tour[];
			int tour_rank[];
			int first_occ[];
			int c;
			sgt s;
			public lca_RMQ(int a, ArrayList<edge>[] b) {
				n=a;
				g=b;
				c=0;
				lvl = new int[n];
				dist = new int[n];
				tour = new int[2*n];
				tour_rank = new int[2*n];
				first_occ = new int[n];
				Arrays.fill(first_occ, -1);
			}
			void pre_process() {
				tour[c++] = 0;
				dfs(0,-1);
				for(int i=0;i<2*n;i++) {
					tour_rank[i] = lvl[tour[i]];
					if(first_occ[tour[i]]==-1) first_occ[tour[i]] = i;
				}
				s = new sgt(0,2*n,tour_rank);
			}
			void dfs(int cur, int pre) {
				for(edge nxt_edge:g[cur]) {
					if(nxt_edge.t!=pre) {
						lvl[nxt_edge.t] = lvl[cur]+1;
						dist[nxt_edge.t] = dist[cur]+nxt_edge.len;
						tour[c++] = nxt_edge.t;
						dfs(nxt_edge.t,cur);
						tour[c++] = cur;
					}
				}				
			}			
			int work(int p,int q) {			
				int a = Math.max(first_occ[p], first_occ[q]);
				int b = Math.min(first_occ[p], first_occ[q]);
				int idx = s.query_min_idx(b, a+1);
				//Dumper.print(a+" "+b+" "+idx);
				int c = tour[idx];
				return dist[p]+dist[q]-dist[c]*2;
			}
		}		

		  
	    static class sgt{
	    	sgt lt;
	    	sgt rt;
	    	int l,r;
	    	int sum, max, min, lazy;
	    	int min_idx;
	    	public sgt(int L, int R, int arr[]) {
	    		l=L;r=R;
	    		if(l==r-1) {
	    			sum = max = min = arr[l];
	    			lazy = 0;
	    			min_idx = l;
	    			return;
	    		}
	    		lt = new sgt(l, l+r>>1, arr);
	    		rt = new sgt(l+r>>1, r, arr);
	    		pop_up();
	    	}
	    	void pop_up() {
	    		this.sum = lt.sum + rt.sum;
	    		this.max = Math.max(lt.max, rt.max);
	    		this.min = Math.min(lt.min, rt.min);
	    		if(lt.min<rt.min)
	    			this.min_idx = lt.min_idx;
	    		else if(lt.min>rt.min) this.min_idx = rt.min_idx;
	    		else this.min = Math.min(lt.min_idx, rt.min_idx);
	    	}
	    	void push_down() {
	    		if(this.lazy!=0) {
	    			lt.sum+=lazy;
	    			rt.sum+=lazy;
	    			lt.max+=lazy;
	    			lt.min+=lazy;
	    			rt.max+=lazy;
	    			rt.min+=lazy;
	    			lt.lazy+=this.lazy;
	    			rt.lazy+=this.lazy;
	    			this.lazy = 0;
	    		}
	    	}
	    	void change(int L, int R, int v) {
	    		if(R<=l||r<=L) return;
	    		if(L<=l&&r<=R) {
	    			this.max+=v;
	    			this.min+=v;
	    			this.sum+=v*(r-l);
	    			this.lazy+=v;
	    			return;
	    		}
	    		push_down();
	    		lt.change(L, R, v);
	    		rt.change(L, R, v);
	    		pop_up();
	    	}
	    	int query_max(int L, int R) {
	    		if(L<=l&&r<=R) return this.max;
	    		if(r<=L||R<=l) return Integer.MIN_VALUE;
	    		push_down();
	    		return Math.max(lt.query_max(L, R), rt.query_max(L, R));	    		
	    	}
	    	int query_min(int L, int R) {
	    		if(L<=l&&r<=R) return this.min;
	    		if(r<=L||R<=l) return Integer.MAX_VALUE;
	    		push_down();
	    		return Math.min(lt.query_min(L, R), rt.query_min(L, R));	
	    	}
	    	int query_sum(int L, int R) {
	    		if(L<=l&&r<=R) return this.sum;
	    		if(r<=L||R<=l) return 0;
	    		push_down();
	    		return lt.query_sum(L, R) + rt.query_sum(L, R);
	    	}
	    	int query_min_idx(int L, int R) {
	    		if(L<=l&&r<=R) return this.min_idx;
	    		if(r<=L||R<=l) return Integer.MAX_VALUE;
	    		int a = lt.query_min_idx(L, R);
	    		int b = rt.query_min_idx(L, R);
	    		int aa = lt.query_min(L, R);
	    		int bb = rt.query_min(L, R);
	    		if(aa<bb) return a;
	    		else if(aa>bb) return b;	    		
	    		return Math.min(a,b);
	    	}
	    }	   
			    	
		List<List<Integer>> convert(int arr[][]){
			int n = arr.length;
			List<List<Integer>> ret = new ArrayList<>();
			for(int i=0;i<n;i++) {
				ArrayList<Integer> tmp = new ArrayList<Integer>();
				for(int j=0;j<arr[i].length;j++) tmp.add(arr[i][j]);
				ret.add(tmp);
			}
			return ret;
		}
		
		public class TreeNode {
			int val;
			TreeNode left;
			TreeNode right;
			TreeNode(int x) { val = x; }
		}
	
		public int GCD(int a, int b) {
		   if (b==0) return a;
		   return GCD(b,a%b);
		}
		public long GCD(long a, long b) {
			   if (b==0) return a;
			   return GCD(b,a%b);
		}		
	}
	
	
    static class ArrayUtils {
        static final long seed = System.nanoTime();
        static final Random rand = new Random(seed);
 
        public static void sort(int[] a) {
            shuffle(a);
            Arrays.sort(a);
        }
 
        public static void shuffle(int[] a) {
            for (int i = 0; i < a.length; i++) {
                int j = rand.nextInt(i + 1);
                int t = a[i];
                a[i] = a[j];
                a[j] = t;
            }
        }
        
        public static void sort(long[] a) {
            shuffle(a);
            Arrays.sort(a);
        }        
        
        public static void shuffle(long[] a) {
            for (int i = 0; i < a.length; i++) {
                int j = rand.nextInt(i + 1);
                long t = a[i];
                a[i] = a[j];
                a[j] = t;
            }
        }
    }	
	static class BIT{
		int arr[];
		int n;
		public BIT(int a) {
			n=a;
			arr = new int[n];
		}
		int sum(int p) {
			int s=0;
			while(p>0) {
				s+=arr[p];
				p-=p&(-p);
			}
			return s;
		}
		void add(int p, int v) {
			while(p<n) {
				arr[p]+=v;
				p+=p&(-p);
			}
		}
	}
	static class DSU{
		int[] arr;
		int[] sz;
		public DSU(int n) {
			arr = new int[n];
			sz = new int[n];
			for(int i=0;i<n;i++) arr[i] = i;
			Arrays.fill(sz, 1);
		}
		public int find(int a) {
			if(arr[a]!=a) arr[a] = find(arr[a]);
			return arr[a];
		}
		public void union(int a, int b) {
			int x = find(a);
			int y = find(b);
			if(x==y) return;
			arr[y] = x;
			sz[x] += sz[y];
		}
		public int size(int x) {
			return sz[find(x)];
		}
	}	
	static class MinHeap<Key> implements Iterable<Key> {
		private int maxN;
		private int n;
		private int[] pq;
		private int[] qp;
		private Key[] keys;
		private Comparator<Key> comparator;
		
		public MinHeap(int capacity){
			if (capacity < 0) throw new IllegalArgumentException();
			this.maxN = capacity;
			n=0;
			pq = new int[maxN+1];
			qp = new int[maxN+1];
			keys = (Key[]) new Object[capacity+1];
			Arrays.fill(qp, -1);
		}
		
		public MinHeap(int capacity, Comparator<Key> c){
			if (capacity < 0) throw new IllegalArgumentException();
			this.maxN = capacity;
			n=0;
			pq = new int[maxN+1];
			qp = new int[maxN+1];
			keys = (Key[]) new Object[capacity+1];
			Arrays.fill(qp, -1);
			comparator = c;
		}			
		public boolean isEmpty()	{ return n==0; 	}
		public int size()			{ return n;		}
		public boolean contains(int i) {
	        if (i < 0 || i >= maxN) throw new IllegalArgumentException();
	        return qp[i] != -1;
		}	
		public int peekIdx() {
	        if (n == 0) throw new NoSuchElementException("Priority queue underflow");
	        return pq[1];		
		}	
		public Key peek(){
			if(isEmpty()) throw new NoSuchElementException("Priority queue underflow");
			return keys[pq[1]];
		}
		public int poll(){
			if(isEmpty()) throw new NoSuchElementException("Priority queue underflow");
			int min = pq[1];
			exch(1,n--);
			down(1);
			assert min==pq[n+1];
			qp[min] = -1;
			keys[min] = null;		
			pq[n+1] = -1;
			return min;
		}
	    public void update(int i, Key key) {
	        if (i < 0 || i >= maxN) throw new IllegalArgumentException();
	        if (!contains(i)) {
	        	this.add(i, key);
	        }else {
	        	keys[i] = key;
	        	up(qp[i]);
	        	down(qp[i]);
	        }
	    }	
		private void add(int i, Key x){
	        if (i < 0 || i >= maxN) throw new IllegalArgumentException();
	        if (contains(i)) throw new IllegalArgumentException("index is already in the priority queue");
	        n++;
	        qp[i] = n;
	        pq[n] = i;
	        keys[i] = x;
	        up(n);
		}
		private void up(int k){
			while(k>1&&less(k,k/2)){
				exch(k,k/2);
				k/=2;
			}
		}
		private void down(int k){
			while(2*k<=n){
				int j=2*k;
				if(j<n&&less(j+1,j)) j++;
				if(less(k,j)) break;
				exch(k,j);
				k=j;
			}
		}
		
		public boolean less(int i, int j){
	        if (comparator == null) {
	            return ((Comparable<Key>) keys[pq[i]]).compareTo(keys[pq[j]]) < 0;
	        }
	        else {
	            return comparator.compare(keys[pq[i]], keys[pq[j]]) < 0;
	        }
		}
 
		public void exch(int i, int j){
	        int swap = pq[i];
	        pq[i] = pq[j];
	        pq[j] = swap;
	        qp[pq[i]] = i;
	        qp[pq[j]] = j;
		}
 
		@Override
		public Iterator<Key> iterator() {
			// TODO Auto-generated method stub
			return null;
		}
	}  	
 
    private static class InputReader
    {
        private InputStream stream;
        private byte[] buf = new byte[1024];
        private int zcurChar;
        private int znumChars;
        private SpaceCharFilter filter;
 
        public InputReader(InputStream stream)
        {
            this.stream = stream;
        }
 
        public int read()
        {
            if (znumChars == -1)
                throw new InputMismatchException();
            if (zcurChar >= znumChars)
            {
            	zcurChar = 0;
                try
                {
                    znumChars = stream.read(buf);
                } catch (IOException e)
                {
                    throw new InputMismatchException();
                }
                if (znumChars <= 0)
                    return -1;
            }
            return buf[zcurChar++];
        }
 
        public int nextInt()
        {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-')
            {
                sgn = -1;
                c = read();
            }
            int res = 0;
            do
            {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = read();
            } while (!isSpaceChar(c));
            return res * sgn;
        }
 
        public String nextString()
        {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            StringBuilder res = new StringBuilder();
            do
            {
                res.appendCodePoint(c);
                c = read();
            } while (!isSpaceChar(c));
            return res.toString();
        }
 
        public double nextDouble()
        {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-')
            {
                sgn = -1;
                c = read();
            }
            double res = 0;
            while (!isSpaceChar(c) && c != '.')
            {
                if (c == 'e' || c == 'E')
                    return res * Math.pow(10, nextInt());
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = read();
            }
            if (c == '.')
            {
                c = read();
                double m = 1;
                while (!isSpaceChar(c))
                {
                    if (c == 'e' || c == 'E')
                        return res * Math.pow(10, nextInt());
                    if (c < '0' || c > '9')
                        throw new InputMismatchException();
                    m /= 10;
                    res += (c - '0') * m;
                    c = read();
                }
            }
            return res * sgn;
        }
 
        public long nextLong()
        {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-')
            {
                sgn = -1;
                c = read();
            }
            long res = 0;
            do
            {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = read();
            } while (!isSpaceChar(c));
            return res * sgn;
        }
 
        public boolean isSpaceChar(int c)
        {
            if (filter != null)
                return filter.isSpaceChar(c);
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }
 
        public String next()
        {
            return nextString();
        }
 
        public interface SpaceCharFilter
        {
            public boolean isSpaceChar(int ch);
        }
        public int[] readIntArray(int n) {
            int[] ret = new int[n];
            for (int i = 0; i < n; i++) {
                ret[i] = nextInt();
            }
            return ret;
        }        
    }    
 
	static class Dumper {
		static void print_int_arr(int[] arr) {
			for (int i = 0; i < arr.length; i++) {
				System.out.print(arr[i] + " ");
			}
			System.out.println();
			System.out.println("---------------------");
		}
 
		static void print_char_arr(char[] arr) {
			for (int i = 0; i < arr.length; i++) {
				System.out.print(arr[i] + " ");
			}
			System.out.println();
			System.out.println("---------------------");
		}
 
		static void print_double_arr(double[] arr) {
			for (int i = 0; i < arr.length; i++) {
				System.out.print(arr[i] + " ");
			}
			System.out.println();
			System.out.println("---------------------");
		}
 
		static void print_2d_arr(int[][] arr, int x, int y) {
			for (int i = 0; i < x; i++) {
				for (int j = 0; j < y; j++) {
					System.out.print(arr[i][j] + " ");
				}
				System.out.println();
			}
			System.out.println();
			System.out.println("---------------------");
		}
 
		static void print_2d_arr(boolean[][] arr, int x, int y) {
			for (int i = 0; i < x; i++) {
				for (int j = 0; j < y; j++) {
					System.out.print(arr[i][j] + " ");
				}
				System.out.println();
			}
			System.out.println();
			System.out.println("---------------------");
		}
 
		static void print(Object o) {
			System.out.println(o.toString());
		}
 
		static void getc() {
			System.out.println("here");
		}
	}
}
