Submission #269323

#	Time	Username	Problem	Language	Result	Execution time	Memory
269323		ruler	Secret (JOI14_secret)	C++14	100 / 100	539 ms	8440 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
using namespace std;

const int MAXN = 1e3 + 5;

int n, A[MAXN], DP[MAXN][MAXN];

void Build(int s = 0, int e = n) {
	if (e - s < 2) {
		DP[s][e] = A[s];
		return;
	}
	int md = (s + e) >> 1;
	Build(s, md), Build(md, e);
	DP[md - 1][md] = A[md - 1];
	for (int i = md - 2; i >= s; i--) DP[i][md] = Secret(A[i], DP[i + 1][md]);
	DP[md][md + 1] = A[md];
	for (int i = md + 2; i <= e; i++) DP[md][i] = Secret(DP[md][i - 1], A[i - 1]);
}
int Get(int l, int r, int s = 0, int e = n) {
	int md = (s + e) >> 1;
	if (r < md) return Get(l, r, s, md);
	if (l > md) return Get(l, r, md, e);
	if (r == md) return DP[l][md];
	if (l == md) return DP[md][r];
	return Secret(DP[l][md], DP[md][r]);
}
void Init(int _n, int _A[]) {
	n = _n;
	for (int i = 0; i < n; i++) A[i] = _A[i];
	Build();
}
int Query(int l, int r) {
	return Get(l, r + 1);
}

• Subtask 1: 100 / 100