#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define all(x) x.begin(), x.end()
#define ins insert
#define F first
#define S second
#define ld long double
const int N = 1e5 + 7, mod = 1e9 + 7;
int dp[N][2], a[N];
void solve(){
int n, q;
cin>>n>>q;
for(int i = 1; i <= n; i++){
cin>>a[i];
}
while(q--){
int l, r, x;
cin>>l>>r>>x;
for(int i = l; i <= r; i++){
a[i] += x;
}
int ans = 0;
for(int i = 2; i <= n; i++){
dp[i][0] = max({0ll, dp[i - 1][0] + (a[i] - a[i - 1]), dp[i - 1][1]});
dp[i][1] = max({0ll, dp[i - 1][1] + (a[i - 1] - a[i]), dp[i - 1][0]});
}
cout<<max(dp[n][1], dp[n][0])<<'\n';
}
}
signed main(){
ios_base :: sync_with_stdio(false);
cin.tie(0);
//freopen("area.in", "r", stdin);
//freopen("area.out", "w", stdout);
int t = 1;
//cin>>t;
while(t--){
solve();
}
}
