#include <bits/stdc++.h>
#define ADD(a, b) a = (a + ll(b)) % mod
#define MUL(a, b) a = (a * ll(b)) % mod
#define MAX(a, b) a = max(a, b)
#define MIN(a, b) a = min(a, b)
#define rep(i, a, b) for(int i = int(a); i < int(b); i++)
#define rer(i, a, b) for(int i = int(a) - 1; i >= int(b); i--)
#define all(a) (a).begin(), (a).end()
#define sz(v) (int)(v).size()
#define pb push_back
#define sec second
#define fst first
#define debug(fmt, ...) Debug(__LINE__, ":", fmt, ##__VA_ARGS__)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef pair<int, pi> ppi;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vl> mat;
typedef complex<double> comp;
void Debug() {cout << '\n'; }
template<class FIRST, class... REST>void Debug(FIRST arg, REST... rest){
	cout<<arg<<" ";Debug(rest...);}
template<class T>ostream& operator<<(ostream& out,const vector<T>& v) {
	out<<"[";if(!v.empty()){rep(i,0,sz(v)-1)out<<v[i]<<", ";out<<v.back();}out<<"]";return out;}
template<class S, class T>ostream& operator<<(ostream& out,const pair<S, T>& v){
	out<<"("<<v.first<<", "<<v.second<<")";return out;}
const int MAX_N = 200010;
const int MAX_V = 100010;
const double eps = 1e-6;
const ll mod = 1000000007;
const int inf = 1 << 29;
const ll linf = 1LL << 60;
const double PI = 3.14159265358979323846;
///////////////////////////////////////////////////////////////////////////////////////////////////

int N, Q;
ll A[MAX_N], B[MAX_N]; //[0, 2 * N) !!
multiset<ll> S;

void solve() {
	cin >> N >> Q;
	rep(i, 0, 2 * N) cin >> A[i];
	rep(i, 0, 2 * N) cin >> B[i];

	ll ans = 0; bool odd = false;
	ans += A[0] + A[2 * N - 1];
	rep(i, 1, 2 * N - 1) {
		ans += max(A[i], B[i]);
		odd ^= (A[i] > B[i]);
		S.insert(abs(A[i] - B[i]));
	}
	while(Q--) {
		ll a, x, y;
		cin >> a >> x >> y; a--;
		if(a == 0 || a == 2 * N - 1) {
			ans += x - A[a];
			A[a] = x;
		}
		else {
			odd ^= (A[a] > B[a]);
			odd ^= (x > y);
			ans += max(x, y) - max(A[a], B[a]);
			S.erase(S.lower_bound(abs(A[a] - B[a])));
			S.insert(abs(x - y));
			A[a] = x; B[a] = y;
		}
		cout << (!odd ? ans : ans - (*S.begin())) << "\n";
	}
}

int main() {
#ifndef LOCAL
	ios::sync_with_stdio(false);
    cin.tie(0);
#endif
    cout << fixed;
	cout.precision(20);
	srand((unsigned int)time(NULL));
#ifdef LOCAL
	//freopen("in.txt", "wt", stdout); //for tester
    freopen("in.txt", "rt", stdin);
#endif	
	solve();
#ifdef LOCAL
    cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
	return 0;
}

