#include "secret.h"
using ll = long long;
int val[12][1005], a[1005], n;
void precalc(ll l, ll r, ll la){
ll m = (l+r)>>1;
if(l > r)return;
val[la][m] = a[m];
if(l == r)return;
if(l<=m-1)val[la][m-1] = a[m-1];
for(ll i = m+1;i<=r;i++)val[la][i]=Secret(val[la][i-1],a[i]);
for(ll i = m-2;i>=l;i--)val[la][i]=Secret(a[i],val[la][i+1]);
precalc(l,m-1,la+1);
precalc(m+1,r,la+1);
}
void Init(int N, int A[]){
for(ll i = 0;i<N;i++)a[i] = A[i];
precalc(0,N-1,0);
n = N;
}
int query(int L, int R, ll l, ll r, ll la){
ll m = (l+r)>>1;
if(L <= m && m <= R){
if(L!=m)
return Secret(val[la][L],val[la][R]);
return val[la][R];
}
if(m > L)return query(L,R,l,m-1,la+1);
return query(L,R,m+1,r,la+1);
}
int Query(int L, int R){
return query(L,R,0,n-1,0);
}
