#include <bits/stdc++.h>
#define fi first
#define se second
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<pii,ll> piii;
typedef pair<pii,pii> piiii;
const int MAXN = 1e5+5, LOG = 17;
int N, Q, A, L, R, par[MAXN][LOG];
ll P[MAXN];
map <ll,int> last;
int main() {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> N;
for (int i=1;i<=N;i++) {
cin >> A;
P[i] = P[i-1]+A;
}
L = N+1;
for (int i=0;i<LOG;i++) {
par[L][i] = L;
}
for (int i=N;i>=0;i--) {
if (last.count(P[i])) {
L = min(L,last[P[i]]);
}
last[P[i]] = i;
par[i][0] = L;
for (int j=1;j<LOG;j++) {
par[i][j] = par[par[i][j-1]][j-1];
}
}
cin >> Q;
for (int i=1;i<=Q;i++) {
cin >> L >> R;
L--;
A = 0;
for (int j=LOG-1;j>=0;j--) {
if (par[L][j] <= R) {
A += 1<<j;
L = par[L][j];
}
}
cout << A << "\n";
}
}
