Submission #573926

#	Time	Username	Problem	Language	Result	Execution time	Memory
573926		Vanilla	Secret (JOI14_secret)	C++17	0 / 100	456 ms	12344 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
using namespace std;
const int maxn = 1001;
int pref [maxn][maxn];
int sg [maxn][maxn];
int a[maxn];
int n;

void build (int l, int r) {
	int mid = (l + r) / 2;
	if (l >= r) return;
	for (int i = mid; i >= l; i--){
		for (int j = mid; j <= r; j++){
			sg[i][j] = mid;
		}
	}
	for (int i = mid + 2; i <= r; i++){
		pref[mid + 1][i] = Secret(pref[mid + 1][i-1], a[i]);
	}
	for (int i = mid - 1; i >= l; i--){
		pref[i][mid] = Secret(pref[i + 1][mid], a[i]);
	}
	build (l, mid);
	build (mid + 1, r);

}

void Init(int N, int A[]) {
	n = N;
	for (int i = 0; i < n; i++){
		a[i] = A[i];
		pref[i][i] = a[i];
	}
	build(0, n - 1);
}

int Query(int L, int R) {
	int mid = sg[L][R];
	if (pref[L][R]) return pref[L][R];
	return Secret(pref[L][mid], pref[mid + 1][R]);
}

• Subtask 1: 0 / 100