#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n,q; cin>>n>>q;
	int a[n+1];
	for(int i=1;i<=n;++i) cin>>a[i];
	while(q--){
		int l,r,x; cin>>l>>r>>x;
		for(int i=l;i<=r;++i) a[i]+=x;
		int dp[n+1];
		dp[0]=0;
		for(int i=1;i<=n;++i){
			dp[i]=dp[i-1];
			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(dp[i],dp[j-1]+(mx-mn));
			}
		}
		cout<<dp[n]<<'\n';
	}
	return 0;
}
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