#include<bits/stdc++.h>
using namespace std;
const int N = 2e6 + 7;
const int inf = 1e9 + 7;
const long long infll = 1e18 + 7;
typedef pair< float, int > ii;
int n, q;
int a[N];
long long GetResult() {
vector<long long> dp(n + 1, 0);
long long res = -infll;
for (int i = 1; i <= n; i++) {
int maxValue = -inf;
int minValue = inf;
for (int j = i; j > 0; j--) {
maxValue = max(maxValue, a[j]);
minValue = min(minValue, a[j]);
dp[i] = max(dp[i], dp[j - 1] + maxValue - minValue);
res = max(res, dp[i]);
}
// cout << dp[i] << ' ';
}
return res;
}
int main()
{
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n >> q;
for (int i = 1; i <= n; i++) cin >> a[i];
while (q--) {
int l, r, v; cin >> l >> r >> v;
for (int i = l; i <= r; i++) a[i] += v;
cout << GetResult();
if (q > 0) cout << '\n';
}
return 0;
}
