Submission #838713

#	Time	Username	Problem	Language	Result	Execution time	Memory
838713		adaawf	Secret (JOI14_secret)	C++14	100 / 100	411 ms	4460 KiB

secret

#include "secret.h"
#include <iostream>
using namespace std;
int f[11][1005], g[11][1005], a[1005], n, res;
void dnc(int l, int r, int x) {
	if (l >= r) return;
	int mid = (l + r) / 2;
	f[x][mid] = a[mid];
	for (int i = mid - 1; i >= l; i--) {
		f[x][i] = Secret(a[i], f[x][i + 1]);
	}
	g[x][mid + 1] = a[mid + 1];
	for (int i = mid + 2; i <= r; i++) {
		g[x][i] = Secret(g[x][i - 1], a[i]);
	}
	dnc(l, mid, x + 1);
	dnc(mid + 1, r, x + 1);
}
void trya(int tl, int tr, int l, int r, int x) {
	if (l >= r) {
		return;
	}
	int mid = (l + r) / 2;
	if (l <= tl && tl <= mid && mid + 1 <= tr && tr <= r) {
		res = Secret(f[x][tl], g[x][tr]);
		return;
	}
	trya(tl, tr, l, mid, x + 1);
	trya(tl, tr, mid + 1, r, x + 1);
}
void Init(int N, int A[]) {
	n = N;
	for (int i = 0; i < n; i++) {
		a[i] = A[i];
	}
	dnc(0, n - 1, 1);
}
int Query(int L, int R) {
	if (L == R) {
		return a[L];
	}
	res = 0;
	trya(L, R, 0, n - 1, 1);
	return res;
}

• Subtask 1: 100 / 100