This is the easy version of the problem. The difference between the versions is that the easy version does not require you to output the numbers of the rods to be removed. You can make hacks only if all versions of the problem are solved.

Stitch likes experimenting with different machines with his friend Sparky. Today they built another machine.

The main element of this machine are n rods arranged along one straight line and numbered from 1 to n inclusive. Each of these rods must carry an electric charge quantitatively equal to either 1 or -1 (otherwise the machine will not work). Another condition for this machine to work is that the sign-variable sum of the charge on all rods must be zero.

More formally, the rods can be represented as an array of n numbers characterizing the charge: either 1 or -1. Then the condition must hold: a_1 - a_2 + a_3 - a_4 + … = 0, or ∑_{i=1}^n (-1)^{i-1} ⋅ a_i = 0.

Sparky charged all n rods with an electric current, but unfortunately it happened that the rods were not charged correctly (the sign-variable sum of the charge is not zero). The friends decided to leave only some of the rods in the machine. Sparky has q questions. In the ith question Sparky asks: if the machine consisted only of rods with numbers l_i to r_i inclusive, what minimal number of rods could be removed from the machine so that the sign-variable sum of charges on the remaining ones would be zero? Perhaps the friends got something wrong, and the sign-variable sum is already zero. In that case, you don't have to remove the rods at all.

If the number of rods is zero, we will assume that the sign-variable sum of charges is zero, that is, we can always remove all rods.

Help your friends and answer all of Sparky's questions!

Input

Each test contains multiple test cases.

The first line contains one positive integer t (1 ≤ t ≤ 10^3), denoting the number of test cases. Description of the test cases follows.

The first line of each test case contains two positive integers n and q (1 ≤ n, q ≤ 3 ⋅ 10^5) — the number of rods and the number of questions.

The second line of each test case contains a non-empty string s of length n, where the charge of the i-th rod is 1 if s_i is the "+" symbol, or -1 if s_i is the "-" symbol.

Each next line from the next q lines contains two positive integers l_i ans r_i (1 ≤ l_i ≤ r_i ≤ n) — numbers, describing Sparky's questions.

It is guaranteed that the sum of n over all test cases does not exceed 3 ⋅ 10^5, and the sum of q over all test cases does not exceed 3 ⋅ 10^5.

Output

For each test case, print a single integer — the minimal number of rods that can be removed.

Example

Input


3
14 1
+--++---++-++-
1 14
14 3
+--++---+++---
1 14
6 12
3 10
4 10
+-+-
1 1
1 2
1 3
1 4
2 2
2 3
2 4
3 3
3 4
4 4


Output


2
2
1
0
1
2
1
2
1
2
1
1
2
1

Note

In the first test case for the first query you can remove the rods numbered 5 and 8, then the following set of rods will remain: +--+--++-++-. It is easy to see that here the sign-variable sum is zero.

In the second test case:

  * For the first query, we can remove the rods numbered 1 and 11, then the following set of rods will remain: --++---++---. It is easy to see that here the sign-variable sum is zero. 
  * For the second query we can remove the rod numbered 9, then the following set of rods will remain: ---++-. It is easy to see that here the variable sum is zero. 
  * For the third query we can not remove the rods at all. 
//package codechef;
import java.io.*;
import java.util.*;



public class cp_class {

	static int mod=(int)1e9+7;
	
//	static  Reader sc=new Reader();
	   static FastReader sc=new FastReader(System.in);
	   
	   
	   	
	
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		//FastReader sc=new FastReader();
			
			int t=sc.nextInt();
			
			while(t-->0)
			{
				int n=sc.nextInt();
				int q=sc.nextInt();
				String str=sc.next();
				
				
				
				int[] arr=new int[n+1];
				
				
				
				for(int i=0;i<n;i++)
				{
					if(str.charAt(i)=='+')
					{
						arr[i+1]=1;
						if((i&1)==1)
						arr[i+1]=-1*arr[i+1];
					}
					else
					{
						arr[i+1]=-1;
						if((i&1)==1)
						arr[i+1]=-1*arr[i+1];
					}
				}
				
				
				
				
				for(int i=1;i<=n;i++)
				{
					arr[i]=arr[i]+arr[i-1];
				}
				
				
				while(q-->0)
				{
					int l=sc.nextInt(),r=sc.nextInt();
					int sum=arr[r]-arr[l-1];
					if(sum==0)
					out.println("0");
					else
					{
						int length=r-l+1;
						if((length&1)==0)
							out.println("2");
						else
							out.println("1");
					}
				}
				
				
			}
			
			
			out.flush();
			out.close();
			System.gc();
	
	}
	
	
	


	/*
	   ...SOLUTION ENDS HERE...........SOLUTION ENDS HERE...
	 */
	 
	static boolean prime[];
	
	static void sieveOfEratosthenes(int n)
    {
        // Create a boolean array
        // "prime[0..n]" and
        // initialize all entries
        // it as true. A value in
        // prime[i] will finally be
        // false if i is Not a
        // prime, else true.
        prime= new boolean[n + 1];
        for (int i = 0; i <= n; i++)
            prime[i] = true;
 
        for (int p = 2; p * p <= n; p++)
        {
            // If prime[p] is not changed, then it is a
            // prime
            if (prime[p] == true)
            {
                // Update all multiples of p
                for (int i = p * p; i <= n; i += p)
                    prime[i] = false;
            }
        }
 
        // Print all prime numbers
//        for (int i = 2; i <= n; i++)
//        {
//            if (prime[i] == true)
//                System.out.print(i + " ");
//        }
    }
	
	
	
	
	
	
	
	
	
	
	
	
	static int N = 1010; 
	 
	// Array to store inverse of 1 to N
	static long[] factorialNumInverse = new long[N + 1];
	 
	// Array to precompute inverse of 1! to N!
	static long[] naturalNumInverse = new long[N + 1];
	 
	// Array to store factorial of first N numbers
	static long[] fact = new long[N + 1];
	 
	// Function to precompute inverse of numbers
	public static void InverseofNumber(int p)
	{
	    naturalNumInverse[0] = naturalNumInverse[1] = 1;
	     
	    for(int i = 2; i <= N; i++)
	        naturalNumInverse[i] = naturalNumInverse[p % i] *
	                                 (long)(p - p / i) % p;
	}
	 
	// Function to precompute inverse of factorials
	public static void InverseofFactorial(int p)
	{
	    factorialNumInverse[0] = factorialNumInverse[1] = 1;
	 
	    // Precompute inverse of natural numbers
	    for(int i = 2; i <= N; i++)
	        factorialNumInverse[i] = (naturalNumInverse[i] *
	                           factorialNumInverse[i - 1]) % p;
	}
	 
	// Function to calculate factorial of 1 to N
	public static void factorial(int p)
	{
	    fact[0] = 1;
	 
	    // Precompute factorials
	    for(int i = 1; i <= N; i++)
	    {
	        fact[i] = (fact[i - 1] * (long)i) % p;
	    }
	}
	 
	// Function to return nCr % p in O(1) time
	public static long Binomial(int N, int R, int p)
	{
	     
	    // n C r = n!*inverse(r!)*inverse((n-r)!)
	    long ans = ((fact[N] * factorialNumInverse[R]) %
	                       p * factorialNumInverse[N - R]) % p;
	     
	    return ans;
	}
	
	static boolean util(int a,int b,int c)
	{
		if(b>a)util(b, a, c);
		
		while(c>=a)
		{
			c-=a;
			if(c%b==0)
				return true;
		}
		
		
		return (c%b==0);
	}
	
	static boolean check(int arr[])
	{
		for (int i = 1; i < arr.length; i++) {
		if(arr[i-1]>arr[i])
			return false;
		}
		return true;
	}
	
	static void flag(boolean flag)
	   {
	       out.println(flag ? "YES" : "NO");
	       out.flush();
	   }
	   
	static ArrayList<Long> luckNums;
	static void luckyNum(long x,long p10)
	{
		luckNums.add(x);
		if(x>(long)1e10)
			return;
		luckyNum(x+4*p10, p10*10);
		luckyNum(x+7*p10, p10*10);
		
	}
	
	 /*                     
	    Map<Long,Long> map=new HashMap<>();
	             for(int i=0;i<n;i++)
	               {
	                  if(!map.containsKey(a[i]))
	                   map.put(a[i],1);
	                 else
	                   map.replace(a[i],map.get(a[i])+1);
	               }
	     
	    Set<Map.Entry<Long,Long>> hmap=map.entrySet();
	             for(Map.Entry<Long,Long> data : hmap)
	               {
	          
	               }
	       
	   Iterator<Integer> it = set.iterator();
	          while(it.hasNext()) 
	           { 
	            int x=it.next();
	           }
	   */

	
	
	static void print(int a[])
	  {
	     int n=a.length;
	     for(int i=0;i<n;i++)
	       {
	          out.print(a[i]+" ");
	       }
	     out.println();
	     out.flush();
	  }
	static void print(long a[])
	  {
	     int n=a.length;
	     for(int i=0;i<n;i++)
	       {
	          out.print(a[i]+" ");
	       }
	     out.println();
	     out.flush();
	  } 
	static void print_int(ArrayList<Integer> al)
	  {
	     int si=al.size();
	     for(int i=0;i<si;i++)
	       {
	          out.print(al.get(i)+" ");
	       }
	     out.println();
	     out.flush();
	  }
	static void print_long(ArrayList<Long> al)
	  {
	     int si=al.size();
	     for(int i=0;i<si;i++)
	       {
	          out.print(al.get(i)+" ");
	       }
	     out.println();
	     out.flush();
	  }
	  
	static int LowerBound(int a[], int x) 
	 { // x is the target value or key
	  int l=-1,r=a.length;
	  while(l+1<r) {
	    int m=(l+r)>>>1;
	    if(a[m]>=x) r=m;
	    else l=m;
	  }
	  return r;
	}
	
	
	static int lowerIndex(int arr[], int n, int x)
    {
        int l = 0, h = n - 1;
        while (l <= h)
        {
            int mid = (l + h) / 2;
            if (arr[mid] >= x)
                h = mid - 1;
            else
                l = mid + 1;
        }
        return l;
    }
     
	
	 static int UpperBound(int a[], int x)
	  {// x is the key or target value
	    int l=-1,r=a.length;
	    while(l+1<r) {
	       int m=(l+r)>>>1;
	       if(a[m]<=x) l=m;
	       else r=m;
	    }
	    return l+1;
	 }
	 static class DisjointUnionSets
	 {
	    int[] rank, parent;
	    int n;
	    // Constructor
	    public DisjointUnionSets(int n)
	    {
	        rank = new int[n];
	        parent = new int[n];
	        this.n = n;
	        makeSet();
	    }
	    // Creates n sets with single item in each
	    void makeSet()
	    {
	        for (int i = 0; i < n; i++)
	            parent[i] = i;
	    }
	    int find(int x)
	    {
	        if (parent[x] != x) {
	            parent[x] = find(parent[x]);
	        }
	        return parent[x];
	    }
	    // Unites the set that includes x and the set
	    // that includes x
	    void union(int x, int y)
	    {
	        int xRoot = find(x), yRoot = find(y);
	        if (xRoot == yRoot)
	            return;
	        if (rank[xRoot] < rank[yRoot])
	            parent[xRoot] = yRoot;
	        else if (rank[yRoot] < rank[xRoot])
	         parent[yRoot] = xRoot;
	        else // if ranks are the same
	        {
	         parent[yRoot] = xRoot;
	            rank[xRoot] = rank[xRoot] + 1;
	        }
	    }
	 }

	 
//	static class countClass{
//		int cnt;
//		public countClass() {
//			this.cnt=0;
//			// TODO Auto-generated constructor stub
//		}
//	}

	 
	 
	static class Graph
	  {
	        int v;
	        ArrayList<Integer> list[];
	        Graph(int v)
	        {
	            this.v=v;
	            list=new ArrayList[v+1];
	            for(int i=1;i<=v;i++)
	                list[i]=new ArrayList<Integer>();
	        }
	        void addEdge(int a, int b)
	        {
	            this.list[a].add(b);
	        }
	    }
	
//	static class GraphMap{
//		Map<String,ArrayList<String>> graph;
//		GraphMap() {
//			// TODO Auto-generated constructor stub
//			graph=new HashMap<String,ArrayList<String>>();
//			
//		}
//		void addEdge(String a,String b)
//		{
//			if(graph.containsKey(a))
//			this.graph.get(a).add(b);
//			else {
//				this.graph.put(a, new ArrayList<>());
//				this.graph.get(a).add(b);
//			}
//		}
//	}
//	static void dfsMap(GraphMap g,HashSet<String> vis,String src,int ok)
//	{
//		vis.add(src);
//		
//		if(g.graph.get(src)!=null)
//		{
//			for(String each:g.graph.get(src))
//			{
//				if(!vis.contains(each))
//				{
//					dfsMap(g, vis, each, ok+1);
//				}
//			}
//		}
//		
//		cnt=Math.max(cnt, ok);
//	}
	static double sum[];
	static double cnt;
	static void DFS(Graph g, boolean[] visited, int u,double path)
		{
	        visited[u]=true;
	        sum[u]=0;
	        int k=0;
	        for(int i=0;i<g.list[u].size();i++)
	        {
	            int v=g.list[u].get(i);
	            
	            if(!visited[v])
	            {
	            	DFS(g, visited, v,path+1);
	            	sum[u]+=sum[v];
	            	k++;
	            }
	            
	        }
	        if(k!=0)
	        sum[u]=sum[u]/(double)k +1;

	  } 
	
	
	  
	 static class Pair implements Comparable<Pair>
	    {
//	       int x,y;
	       long first,second;
//	       Pair(int x,int y)
//	        {
//	           this.x=x;
//	           this.y=y;
//	        }
	       public Pair(long x,long y) {
			// TODO Auto-generated constructor stub
	    	   this.first=x;
	    	   this.second=y;
		}
		@Override
		public int compareTo(Pair o) {
			// TODO Auto-generated method stub
			if(this.first>o.first)
				return 1;
			else if (this.first<o.first) {
				return -1;
			} else{
				return 0;
			}
			
		}
	    }
	   
	static long sum_array(int a[])
	 {
	    int n=a.length;
	    long sum=0;
	    for(int i=0;i<n;i++)
	     sum+=a[i];
	    return sum;
	 }
	static long sum_array(long a[])
	 {
	    int n=a.length;
	    long sum=0;
	    for(int i=0;i<n;i++)
	     sum+=a[i];
	    return sum;
	 }

	 static void sort(int[] a) 
	   {
			ArrayList<Integer> l=new ArrayList<>();
			for (int i:a) l.add(i);
			Collections.sort(l);
			for (int i=0; i<a.length; i++) a[i]=l.get(i);
		}
	static void sort(long[] a) 
	   {
			ArrayList<Long> l=new ArrayList<>();
			for (long i:a) l.add(i);
			Collections.sort(l);
			for (int i=0; i<a.length; i++) a[i]=l.get(i);
		}

	static void reverse_array(int a[])
	 {
	    int n=a.length;
	    int i,t; 
	    for (i = 0; i < n / 2; i++) { 
	            t = a[i]; 
	            a[i] = a[n - i - 1]; 
	            a[n - i - 1] = t; 
	        } 
	 }
	static void reverse_array(long a[])
	 {
	    int n=a.length;
	    int i; long t; 
	    for (i = 0; i < n / 2; i++) { 
	            t = a[i]; 
	            a[i] = a[n - i - 1]; 
	            a[n - i - 1] = t; 
	        } 
	 }
	 static long modInverse(long a, long m)
		    {
		        long g = gcd(a, m);
		       
		          return   power(a, m - 2, m);
		        
		    }
	static long power(long x, long y, long m)
		    {
		        if (y == 0)
		            return 1;
		        long p = power(x, y / 2, m) % m;
		        p = (int)((p * (long)p) % m);
		        if (y % 2 == 0)
		            return p;
		        else
		            return (int)((x * (long)p) % m);
		    }
	static long gcd(long a, long b) 
	    { 
	        if (a == 0) 
	            return b; 
	          
	        return gcd(b%a, a); 
	    } 
	static int gcd(int a, int b) 
	    { 
	        if (a == 0) 
	            return b; 
	          
	        return gcd(b%a, a); 
	    } 

	   static class FastReader{
	 
	        byte[] buf = new byte[2048];
	        int index, total;
	        InputStream in;
	 
	        FastReader(InputStream is) {
	            in = is;
	        }
	 
	        int scan() throws IOException {
	            if (index >= total) {
	                index = 0;
	                total = in.read(buf);
	                if (total <= 0) {
	                    return -1;
	                }
	            }
	            return buf[index++];
	        }
	 
	        String next() throws IOException {
	            int c;
	            for (c = scan(); c <= 32; c = scan());
	            StringBuilder sb = new StringBuilder();
	            for (; c > 32; c = scan()) {
	                sb.append((char) c);
	            }
	            return sb.toString();
	        }
	 
	        int nextInt() throws IOException {
	            int c, val = 0;
	            for (c = scan(); c <= 32; c = scan());
	            boolean neg = c == '-';
	            if (c == '-' || c == '+') {
	                c = scan();
	            }
	            for (; c >= '0' && c <= '9'; c = scan()) {
	                val = (val << 3) + (val << 1) + (c & 15);
	            }
	            return neg ? -val : val;
	        }
	 
	        long nextLong() throws IOException {
	            int c;
	            long val = 0;
	            for (c = scan(); c <= 32; c = scan());
	            boolean neg = c == '-';
	            if (c == '-' || c == '+') {
	                c = scan();
	            }
	            for (; c >= '0' && c <= '9'; c = scan()) {
	                val = (val << 3) + (val << 1) + (c & 15);
	            }
	            return neg ? -val : val;
	        }
	    }
	   
	    static class Reader 
	    { 
	        final private int BUFFER_SIZE = 1 << 16; 
	        private DataInputStream din; 
	        private byte[] buffer; 
	        private int bufferPointer, bytesRead; 
	  
	        public Reader() 
	        { 
	            din = new DataInputStream(System.in); 
	            buffer = new byte[BUFFER_SIZE]; 
	            bufferPointer = bytesRead = 0; 
	        } 
	  
	        public Reader(String file_name) throws IOException 
	        { 
	            din = new DataInputStream(new FileInputStream(file_name)); 
	            buffer = new byte[BUFFER_SIZE]; 
	            bufferPointer = bytesRead = 0; 
	        } 
	  
	        public String readLine() throws IOException 
	        { 
	            byte[] buf = new byte[64]; // line length 
	            int cnt = 0, c; 
	            while ((c = read()) != -1) 
	            { 
	                if (c == '\n') 
	                    break; 
	                buf[cnt++] = (byte) c; 
	            } 
	            return new String(buf, 0, cnt); 
	        } 
	  
	        public int nextInt() throws IOException 
	        { 
	            int ret = 0; 
	            byte c = read(); 
	            while (c <= ' ') 
	                c = read(); 
	            boolean neg = (c == '-'); 
	            if (neg) 
	                c = read(); 
	            do
	            { 
	                ret = ret * 10 + c - '0'; 
	            }  while ((c = read()) >= '0' && c <= '9'); 
	  
	            if (neg) 
	                return -ret; 
	            return ret; 
	        } 
	  
	        public long nextLong() throws IOException 
	        { 
	            long ret = 0; 
	            byte c = read(); 
	            while (c <= ' ') 
	                c = read(); 
	            boolean neg = (c == '-'); 
	            if (neg) 
	                c = read(); 
	            do { 
	                ret = ret * 10 + c - '0'; 
	            } 
	            while ((c = read()) >= '0' && c <= '9'); 
	            if (neg) 
	                return -ret; 
	            return ret; 
	        } 
	  
	        public double nextDouble() throws IOException 
	        { 
	            double ret = 0, div = 1; 
	            byte c = read(); 
	            while (c <= ' ') 
	                c = read(); 
	            boolean neg = (c == '-'); 
	            if (neg) 
	                c = read(); 
	  
	            do { 
	                ret = ret * 10 + c - '0'; 
	            } 
	            while ((c = read()) >= '0' && c <= '9'); 
	  
	            if (c == '.') 
	            { 
	                while ((c = read()) >= '0' && c <= '9') 
	                { 
	                    ret += (c - '0') / (div *= 10); 
	                } 
	            } 
	  
	            if (neg) 
	                return -ret; 
	            return ret; 
	        } 
	  
	        private void fillBuffer() throws IOException 
	        { 
	            bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE); 
	            if (bytesRead == -1) 
	                buffer[0] = -1; 
	        } 
	  
	        private byte read() throws IOException 
	        { 
	            if (bufferPointer == bytesRead) 
	                fillBuffer(); 
	            return buffer[bufferPointer++]; 
	        } 
	  
	        public void close() throws IOException 
	        { 
	            if (din == null) 
	                return; 
	            din.close(); 
	        } 
	    }
	  static  PrintWriter out=new PrintWriter(System.out);
	  static int int_max=Integer.MAX_VALUE;
	  static int int_min=Integer.MIN_VALUE;
	  static long long_max=Long.MAX_VALUE;
	  static long long_min=Long.MIN_VALUE;

}


