Submission #657773

#	Time	Username	Problem	Language	Result	Execution time	Memory
657773		hollwo_pelw	Secret (JOI14_secret)	C++17	100 / 100	435 ms	8492 KiB

secret

#include "secret.h"
#include <bits/stdc++.h>
using namespace std;
 
// Secret(int x, int y);
 
int calc[1 << 10][1 << 10];
 
void solve(int L, int R, int A[]) {
	if (L == R) return ;
	int M = (L + R + 1) >> 1;
	for (int j = M + 1; j <= R; j++)
		calc[M][j] = Secret(calc[M][j - 1], A[j]);
	for (int j = M - 2; j >= L; j--)
		calc[j][M - 1] = Secret(A[j], calc[j + 1][M - 1]);
	solve(L, M - 1, A);
	solve(M, R, A);
}
 
void Init(int N, int A[]) {
	memset(calc, -1, sizeof calc);
	for (int i = 0; i < N; i++)
		calc[i][i] = A[i];
	solve(0, N - 1, A);
}
 
int Query(int L, int R) {
	if (calc[L][R] >= 0)
		return calc[L][R];
	for (int M = L; M < R; M++) {
		if (calc[L][M] >= 0 && calc[M + 1][R] >= 0)
			return Secret(calc[L][M], calc[M + 1][R]);
	}
	return 0;
}

• Subtask 1: 100 / 100