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