Submission

Score: 100

User: Bune

Problemset: ผลบวก (ง่าย)

Language: cpp

Time: 0.042 second

Submitted On: 2026-02-24 08:06:22

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;

#define fastio ios_base::sync_with_stdio(false); cin.tie(nullptr);
#define ll long long
#define pb push_back
#define all(x) (x).begin(), (x).end()

int main() {
  fastio

  int N;
  vector<int> v;
  int x, y;
  cin >> N;

  for (int i = 0; i < N; i++) {
    int a;
    cin >> a;
    v.pb(a);
  }

  cin >> x >> y;

  int sum = 0;
  for (int i = x; i <= y; i++) {
    sum += v[i];
  }

  cout << sum << '\n';

  return 0;
}