一维差分

#include <bits/stdc++.h>
using namespace std;

const int N = 1e5+10;
int a[N],b[N]; 
void insert(int l, int r, int c)
{
    b[l] += c;        //al,al+1....ar,ar+1....an都会加上c;
    b[r + 1] -= c;    // 打补丁 ar 之后不需要加c
}

int main()
{
    int n,m;
    scanf("%d%d",&n,&m);
    for(int i = 1; i <= n; i ++) scanf("%d",&a[i]);

    for(int i = 1; i <= n; i ++) insert(i, i, a[i]);  //或者直接 b[i] = a[i] - a[i-1];

    int l,r,c;
    while(m --)
    {
        cin >> l >> r >> c;
        insert(l,r,c);
    }
    for(int i = 1; i <= n; i ++)
    {
        b[i] += b[i-1];   // a[i]
        printf("%d ", b[i]);
    }
    return 0;
}