Submission

PPPPPPPPPPPPPPPPPPPP

Score: 100

User: Monasm

Problemset: ผลบวก (กลาง)

Language: cpp

Time: 0.138 second

Submitted On: 2024-09-29 16:33:01

#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;cin >> n;
    vector<int> arr(n),pref(n,0);
    int sum = 0;
    for(int i=0;i<n;i++){
        cin >> arr[i];
        sum+=arr[i];
        pref[i] = sum;
    }
    int q;cin >> q;
    while(q--){
        int x,y;cin >> x >> y;
        if(!x){
            cout<<pref[y]<<endl;
        }
        else{
            cout<< pref[y]-pref[x-1]<<endl;
        }
    }

    return 0;
}