Submission #703298

#	Time	Username	Problem	Language	Result	Execution time	Memory
703298		bane	Secret (JOI14_secret)	C++17	0 / 100	497 ms	8820 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
using namespace std;
typedef long long ll;
const int MAX = 10005;
ll arr[MAX], ret[20][MAX], mask[MAX];
int n;
void init(int l, int r, int dep = 0){
	if (l == r) return;
	int m = l+(r-l)/2;
		for (int i = m; i >= l; i--) ret[dep][i] = (i == m? arr[i] : Secret(arr[i], ret[dep][i+1]));
		for (int i = m+1; i <= r; i++) ret[dep][i] = (i == m+1? arr[i] : Secret(arr[i], ret[dep][i-1]));
		for (int i = m+1; i <= r; i++)  mask[i] ^= (1<<dep);
		init(l, m, dep+1); init(m+1, r, dep+1);
}
void Init(int N_, int A[]) {
	n = N_;
	for (int i = 0; i  < n; ++i)arr[i] = A[i];
	
	init(0,n-1,0);
}
int Query(int L, int R) {
	int k = __builtin_clz(mask[L] ^ mask[R]);
	return Secret(ret[k][L], ret[k][R]);
}

• Subtask 1: 0 / 100