#include <bits/stdc++.h>
#include "secret.h"
using namespace std;
int a[1001],mp[1001][1001];
void solve(int l,int r){
if(l>=r)return;
int mid=(l+r)/2;
for(int i=mid-1;i>=l;i--){
mp[i][mid]=Secret(a[i],mp[i+1][mid]);
}
for(int i=mid+2;i<=r;i++){
mp[mid+1][i]=Secret(mp[mid+1][i-1],a[i]);
}
solve(l,mid-1);
solve(mid+1,r);
}
void Init(int N, int A[]) {
for(int i=0;i<N;i++){
a[i]=A[i];
mp[i][i]=a[i];
}
solve(0,N-1);
}
int Query(int L, int R) {
if(mp[L][R])return mp[L][R];
for(int i=L;i<R;i++){
if(mp[L][i] && mp[i+1][R])return Secret(mp[L][i],mp[i+1][R]);
}
return -1;
}
