acwing 3127. 来，骗 一维前缀和板子题

Posted 2021-05-20 幽殇默

https://www.acwing.com/problem/content/description/3130/

#include<cstdio>
#include<iostream>
using namespace std;
const int N=1e6+10;
int a[N],s[N],q,n;
int main(void)
{
    scanf("%d",&n);
    for(int i=1;i<=n;i++) scanf("%d",&a[i]),s[i]=s[i-1]+a[i];
    cin>>q;
    while(q--)
    {
        int l,r; scanf("%d%d",&l,&r);
        cout<<s[r]-s[l-1]<<endl;
    }
    return 0;
}