#include <bits/stdc++.h>
#include "secret.h"
//~ #include "grader.cpp"
using namespace std;
const int NN = 1001;
const int K = 11;
int n, v[K][NN];
vector <int> a;
void build(int l, int r, int level){
int mid = (l + r) / 2;
v[level][mid] = a[mid];
if(r <= l) return;
v[level][mid + 1] = a[mid + 1];
for(int i = mid - 1 ; i >= l ; i--){
v[level][i] = Secret(a[i], v[level][i + 1]);
}
for(int i = mid + 2 ; i <= r ; i++){
v[level][i] = Secret(v[level][i - 1], a[i]);
}
build(l, mid, level + 1);
build(mid + 1, r, level + 1);
}
int query(int l, int r, int s, int e, int level){
int mid = (l + r) / 2;
if(s <= mid && mid <= e){
if(e == mid) return v[level][s];
if(s == mid + 1) return v[level][e];
return Secret(v[level][s], v[level][e]);
}
else if(e < mid) return query(l, mid, s, e, level + 1);
return query(mid + 1, r, s, e, level + 1);
}
void Init(int N, int A[]) {
n = N;
a.resize(n);
for(int i = 0 ; i < n ; i++){
a[i] = A[i];
}
build(0, n - 1, 0);
}
int Query(int L, int R) {
return query(0, n - 1, L, R, 0);
}
