#include <bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 3e16;
const int N = 2e5 + 5;
int a[N], pr[N];
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n;
cin >> n;
map < int , int > mp;
mp[0]++;
vector < array < int , 2 > > v;
for(int i = 1; i <= n; i++){
cin >> a[i];
pr[i] = pr[i - 1] + a[i];
v.push_back({i, mp.count(pr[i]) == 0 ? -1 : mp[pr[i]]});
mp[pr[i]] = i;
}
// for(auto [i, j] : v)
// cout << "last frequence: " << i << ',' << j << endl;
// cout << endl;
int q;
cin >> q;
while(q--){
int l, r;
cin >> l >> r;
int lst = -1, sz = 0;
for(auto [i, j] : v){
if(j < l || j < lst)
continue;
if(i > r)break;
sz++;
lst = i;
}
cout << sz << endl;
// for(auto i : p)
// cout << i << ' ';
// cout << endl;
}
}
/*
3 2 2 2 4
3 3 3 2 4
*/
