#include <unordered_map>
#include <algorithm>
#include <iostream>
#include <cassert>
#include <numeric>
#include <vector>
typedef long long llong;
const int MAXN = 400000 + 10;
const int MAXLOG = 5;
const int BASE = 20;
std::unordered_map < llong,int > cnt;
int sparse[MAXLOG][MAXN];
int n, q;
void buildSparse()
{
for (int log = 1 ; log <= MAXLOG-1 ; ++log)
{
sparse[log][0] = -1;
for (int i = 1 ; i <= n ; ++i)
{
sparse[log][i] = i;
for (int j = 1 ; j <= BASE ; ++j)
{
sparse[log][i] = sparse[log-1][sparse[log][i]];
if (sparse[log][i] == -1) break;
}
}
}
}
int lifting(int from, int to)
{
int ans = 0;
int pw = 160000;
for (int log = MAXLOG-1 ; log >= 0 ; --log)
{
while (sparse[log][from] >= to-1)
{
ans += pw;
from = sparse[log][from];
}
pw /= BASE;
}
return ans;
}
void solve()
{
int l, r;
buildSparse();
std::cin >> q;
for (int i = 1 ; i <= q ; ++i)
{
std::cin >> l >> r;
std::cout << lifting(r, l) << '\n';
}
}
void read()
{
cnt[0] = 1;
sparse[0][0] = -1;
int curr;
llong sum = 0;
std::cin >> n;
for (int i = 1 ; i <= n ; ++i)
{
std::cin >> curr;
sum += curr;
sparse[0][i] = std::max(sparse[0][i-1], cnt[sum] - 1);
cnt[sum] = i + 1;
}
}
void fastIO()
{
std::ios_base :: sync_with_stdio(0);
std::cout.tie(nullptr);
std::cin.tie(nullptr);
}
int main()
{
fastIO();
read();
solve();
return 0;
}
