#include "secret.h"
#include <bits/stdc++.h>
using namespace std;
int n;
int a[1005];
int val[1005][1005];
vector<int> v[1005];
int kol = 0;
void rek(int l, int r) {
if (l >= r) return;
if (l+1 == r) {
val[l][r] = Secret(val[l][l], val[r][r]);
return;
}
int mid = (l+r)/2;
for (int j = mid-1; j >= l; j--) {
if (kol == 8000) assert(0);
val[j][mid] = Secret(val[j+1][mid], a[j]);
kol++;
}
for (int j = mid+2; j <= r; j++) {
if (kol == 8000) assert(0);
val[mid+1][j] = Secret(val[mid+1][j-1], a[j]);
kol++;
}
rek(l, mid);
rek(mid+1, r);
}
void Init(int N, int A[]) {
n = N;
memset(val, -1, sizeof val);
for (int i = 0; i < n; i++) {
a[i] = A[i];
val[i][i] = a[i];
}
rek(0, n-1);
}
int Query(int l, int r) {
if (val[l][r] != -1) return val[l][r];
for (int i = l; i < r; i++) {
if (val[l][i] != -1 && val[i+1][r] != -1) return Secret(val[l][i], val[i+1][r]);
}
return -1;
}
