【差分】Acwing797.差分

Acwing797.差分

题解

#include <iostream>
#include <cstdio>
using namespace std;

const int N = 1e5+10;

int b[N];

void insert(int l, int r, int c)
{
    b[l] += c, b[r+1] -= c;
}

int main()
{
    int x;
    int n,m;
    scanf("%d%d",&n,&m);
    for(int i = 1; i <= n; ++i)
        scanf("%d",&x), insert(i, i, x);
    int l, r;
    while(m -- )
    {
        scanf("%d%d%d",&l,&r,&x);
        insert(l, r, x);
    }
    int s = 0;
    for(int i = 1; i <= n; ++i)
        s = s + b[i], printf("%d ",s);
    return 0;
}