[백준,c++] 11441번 - 합 구하기

11441번: 합 구하기

#include <iostream>
#include <vector>
 
using namespace std;
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
 
    int N; cin >> N;
 
    int sum = 0;
    vector<int>v(N+1);
    for (int i = 0; i < N; i++) {
        int num; cin >> num;
        sum += num;
        v[i+1] = sum;
    }
    int M; cin >> M;
    while (M--) {
        int a, b; cin >> a >> b;
        cout << v[b] - v[a-1] << "\n";
    }
}