797. 差分

Posted 2021-05-20 幽殇默

https://www.acwing.com/problem/content/description/799/

#include<cstdio>
#include<iostream>
using namespace std;
const int N=1e5+10;
int a[N],b[N],n,m;
void insert(int l,int r,int c)
{
    b[l]+=c;
    b[r+1]-=c;
}
int main(void)
{
    cin>>n>>m;
    for(int i=1;i<=n;i++) cin>>a[i],insert(i,i,a[i]);
    while(m--)
    {
        int l,r,c; cin>>l>>r>>c;
        insert(l,r,c);
    }
    for(int i=1;i<=n;i++) b[i]+=b[i-1];
    for(int i=1;i<=n;i++) cout<<b[i]<<" ";
    cout<<endl;
    return 0;
}