#include "secret.h"
#include <bits/stdc++.h>
using namespace std;
static int N;
static int A[1010];
static int table[1010][1010]; // cache untuk nilai ★
// Build tabel dengan divide and conquer
void build(int l, int r) {
if (l == r) {
table[l][l] = A[l];
return;
}
int mid = (l + r) / 2;
build(l, mid);
build(mid + 1, r);
// Precompute dari mid ke kiri
table[mid][mid] = A[mid];
for (int i = mid - 1; i >= l; i--) {
table[i][mid] = Secret(A[i], table[i + 1][mid]);
}
// Precompute dari mid+1 ke kanan
table[mid + 1][mid + 1] = A[mid + 1];
for (int i = mid + 2; i <= r; i++) {
table[mid + 1][i] = Secret(table[mid + 1][i - 1], A[i]);
}
}
// Fungsi Init
void Init(int n, int arr[]) {
N = n;
for (int i = 0; i < n; i++) A[i] = arr[i];
build(0, N - 1);
}
// Fungsi Query
int Query(int L, int R) {
if (L == R) return A[L];
int l = 0, r = N - 1;
while (l < r) {
int mid = (l + r) / 2;
if (R <= mid) {
r = mid;
} else if (L > mid) {
l = mid + 1;
} else {
return Secret(table[L][mid], table[mid + 1][R]);
}
}
return A[L];
}
