Envío 2389

Código

//
#include <bits/stdc++.h>
using namespace std;
#define INF 1000000000
#define MOD 1000000007
#define PI 3.14159265
#define EPS 1e-9
#define Pi acos(-1.0)
typedef pair<int, int> ii;
typedef long long ll;
typedef vector<ll> vll;
typedef pair<ll,ll> pll;
#define forr(i,a,b) for(int i=(a); i<(b); i++)
#define clean(arr,val) memset(arr,val,sizeof(arr))
#define forn(i,n) forr(i,0,n)
#define PB push_back
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<pll> vpll;

/*CODE START HERE*/

int n, m, sum, p, q;
int arr[50005];
int dp[50005];

int main(){
    ios::sync_with_stdio(0);
    clean(dp,0);
    cin >> n;
    forn(i,n){
        cin >> arr[i];
        sum = 0;
        dp[i+1] = dp[i]+arr[i];
    }
    cin >> m;
    while(m--){
        cin >> p >> q;
        cout << dp[q+1]-dp[p] << "\n";
    }
    return 0;
}