#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define ff first
#define ss second
#define pb push_back
#define SZ(x) ((int)(x).size())
#define all(x) x.begin(), x.end()
#define debug(x) cout << #x << ": " << x << " "
#define nl cout << "\n"
#define rep(i, a, b) for(int i = (a); i < (b); i++)
#define per(i, a, b) for(int i = (a); i >= (b); i--)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int N, Q;
vector<ll> a;
void update(int l, int r, ll k){
rep(i, l, r + 1) a[i] += k;
}
vector<ll> memo;
ll f(int i){
if(i == N) return 0;
ll& ans = memo[i];
if(ans != -1) return ans;
ans = f(i + 1);
ll mn = a[i], mx = a[i];
rep(j, i + 1, N){
mn = min(mn, a[j]); mx = max(mx, a[j]);
ans = max(ans, mx - mn + f(j + 1));
}
return ans;
}
void solve(){
cin >> N >> Q;
a = vector<ll>(N);
rep(i, 0, N) cin >> a[i];
rep(q, 0, Q){
int l, r; ll k;
cin >> l >> r >> k;
--l, --r;
update(l, r, k);
memo = vector<ll>(N, -1);
cout << f(0) << "\n";
}
}
int main(){
ios_base::sync_with_stdio(false), cin.tie(nullptr);
solve();
return 0;
}
