#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
#define int long long
int f(vector<int> &a){
int n = a.size();
vector<int> dp(n);
dp[0] = 0, dp[1] = abs(a[0] - a[1]);
for(int i = 2;i < n; i++){
int mn = a[i], mx = a[i];
for(int j = i-1; j >= 0; j--){
mn = min(mn, a[j]);
mx = max(mx, a[j]);
dp[i] = max((j > 0 ? dp[j-1] : 0) + mx - mn, dp[i]);
}
}
return *max_element(all(dp));
}
signed main(){
ios::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
int n, q; cin >> n >> q;
vector<int> a(n);
for(auto &e : a) cin >> e;
while(q--){
int l, r, x; cin >> l >> r >> x;
l--, r--;
vector<int> v;
for(int i = 0;i < n; i++){
if(l <= i && r >= i) a[i]+= x;
if(v.size() >= 2 && a[i] == v[v.size()-1] && a[i] == v[v.size()-2]){
continue;
}
v.push_back(a[i]);
}
cout << f(v) << '\n';
}
return 0;
}
