Submission #573976

#	Time	Username	Problem	Language	Result	Execution time	Memory
573976		Vanilla	Secret (JOI14_secret)	C++17	0 / 100	461 ms	12136 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
using namespace std;
const int maxn = 1005;
long long pref [maxn][maxn];

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

}

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

int Query(int L, int R) {
	if (pref[L][R] != -1) return pref[L][R];
	for (int i = L; i < R; i++){
		if (pref[L][i] != -1 && pref[i + 1][R] != -1)
			return Secret(pref[L][i], pref[i + 1][R]);
	}
	assert(0);
}

• Subtask 1: 0 / 100