题解 | 【模板】差分

#include<bits/stdc++.h>
using namespace std;
#define endl "\n"
#define int long long 
const int N=1e5+10;

int a[N],d[N],s[N];

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0),cout.tie(0);
    int n,m;
    cin>>n>>m;
    for(int i=1;i<=n;i++)cin>>a[i];
    for(int i=1;i<=n;i++)d[i]=a[i]-a[i-1];
    while (m--) {
    int l,r,k;
    cin>>l>>r>>k;
    d[l]+=k,d[r+1]-=k;
    }
    for(int i=1;i<=n;i++)s[i]=s[i-1]+d[i];
    for(int i=1;i<=n;i++)cout<<s[i]<<" ";
    cout<<endl;
    return 0;
}