subarray sum

#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<string,int> psi;
typedef vector<int> vi;
typedef vector<string> vs;
typedef vector<char> vc;
typedef vector<ll> vll;
typedef vector<vector<int>> vvi;
typedef vector<vector<string>> vvs;
typedef vector<vector<ll>> vvll;

#define FOR(i, a, b) for (auto i=a; i<=(b); i++)
#define FORd(i,b,a) for (int i =b; i >= a; i--)
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define ins insert

const int MOD = 1000000007;
//type functions here


 int main()
{
     std::ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(0);
    vll v,ps;
     ll size,sum=0;
     cin>>size;
     FOR(q,1,size)
     {
         ll temp;
         cin>>temp;
         v.pb(temp);
         sum+=temp;
         ps.pb(sum);
     }
    ll i,j,ans;


     ll z;
     cin>>z;
     FOR(w,1,z){
         cin>>i>>j;
      if(i==0)
          cout<<ps[j]<<endl;
      else
      {ans=ps[j]-(ps[i-1]);
       cout<<ans<<endl;
      }
     }

}