Submission #52543

#	Time	Username	Problem	Language	Result	Execution time	Memory
52543		kriii	Secret (JOI14_secret)	C++17	100 / 100	660 ms	4696 KiB

secret

#include "secret.h"
 
int n, a[1010];
int u[10][1010];
 
void go(int d, int l, int r)
{
	if (l == r) return;
 
	int m = (l + r) / 2;
 
	u[d][m] = a[m];
	for (int i = m-1; i >= l; i--) {
		u[d][i] = Secret(a[i],u[d][i+1]);
	}
	u[d][m + 1] = a[m + 1];
	for (int i = m + 2; i <= r; i++) {
		u[d][i] = Secret(u[d][i-1],a[i]);
	}
 
	go(d + 1, l, m);
	go(d + 1, m + 1, r);
}
 
void Init(int N, int A[]) {
	n = N;
	for (int i = 0; i < n; i++) a[i] = A[i];
	go(0, 0, N - 1);
}
 
int go2(int d, int l, int r, int L, int R)
{
	if (r < L || R < l) return 0;
	int m = (l + r) / 2;
	if (R == m) return u[d][L];
	if (L == m + 1) return u[d][R];
	if (L <= m && m + 1 <= R) return Secret(u[d][L], u[d][R]);
 
	int p = go2(d + 1, l, m, L, R);
	int q = go2(d + 1, m + 1, r, L, R);
	return p + q;
}
 
int Query(int L, int R) {
	if (L == R) return a[L];
	return go2(0,0,n-1,L,R);
}

• Subtask 1: 100 / 100