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