#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second
#define pii pair <int , int>
#define ar3 array <int , 3>
using namespace std;
const int INF = 1e9 + 7;
const int maxn = 3000 + 5;
const int maxk = 2507;
int n , q , a[maxn] , dp[maxn];
void solve()
{
cin >> n >> q;
for(int i = 1; i <= n; i++) cin >> a[i];
dp[0] = 0;
while(q--)
{
int l , r , x; cin >> l >> r >> x;
for(int i = l; i <= r; i++) a[i] += x;
for(int i = 1; i <= n; i++)
{
int mx = -INF*INF;
int mn = INF*INF;
dp[i] = 0;
for(int j = i; j >= 1; j--)
{
mx = max(a[j] , mx);
mn = min(a[j] , mn);
dp[i] = max(dp[j-1] + mx - mn , dp[i]);
}
}
//for(int i = 1; i <= n; i++) cout << a[i] << ' '; cout << '\n';
//for(int i = 1; i <= n; i++) cout << dp[i] << ' '; cout << '\n';
cout << dp[n] << '\n';
}
}
signed main()
{
ios_base::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
solve();
return 0;
}
