Submission #574029

#	Time	Username	Problem	Language	Result	Execution time	Memory
574029		Vanilla	Secret (JOI14_secret)	C++17	100 / 100	524 ms	12168 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
using namespace std;
const int maxn = 1001;
int pref [maxn][maxn];
int sg [maxn][maxn];
 
void build (int l, int r) {
	if (l >= r) return;
	int mid = (l + r) / 2;
    for (int i = l; i <= mid; i++){
        for (int j = mid + 1; 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], pref[i][i]);
	}
	for (int i = mid - 1; i >= l; i--){
		pref[i][mid] = Secret(pref[i][i], pref[i + 1][mid]);
	}
	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;
		}
	}
    for (int i = 0; i < N; i++){
		pref[i][i] = A[i];
    }
	build(0, N);
}
 
int Query(int L, int R) {
	if (pref[L][R] != -1) return pref[L][R];
	int mid = sg[L][R];
	return Secret(pref[L][mid], pref[mid + 1][R]);
}

• Subtask 1: 100 / 100