#include <bits/stdc++.h>
#define ll long long
using namespace std;
#define f first
#define s second
#define pb push_back
#define ep emplace
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define uniquev(v) sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define mem(f,x) memset(f , x , sizeof(f))
#define sz(x) (int)(x).size()
#define __lcm(a, b) (1ll * ((a) / __gcd((a), (b))) * (b))
#define mxx *max_element
#define mnn *min_element
#define cntbit(x) __builtin_popcountll(x)
#define len(x) (int)(x.length())
const int N = 2e5 + 10;
ll a[N], b[N];
ll cal(int n) {
ll ans = 0, sign = 0;
for (int i = 2; i <= n; i++) {
if (a[i] * sign >= 0) {
ans += abs(a[i]);
sign = a[i];
} else {
sign = 0;
}
}
return ans;
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, q;
cin >> n >> q;
for (int i = 1; i <= n; i++) {
cin >> b[i];
a[i] = b[i] - b[i - 1];
}
for (int i = 0; i < q; i++) {
int l, r, x;
cin >> l >> r >> x;
a[l] += x;
a[r + 1] -= x;
cout << cal(n) << '\n';
}
return 0;
}
