Submission #827249

#	Time	Username	Problem	Language	Result	Execution time	Memory
827249		rainboy	Brperm (RMI20_brperm)	C11	13 / 100	117 ms	4452 KiB

brperm

#include "brperm.h"
#include <string.h>

#define N	500000

char cc[N + 1]; int n;

void init(int n_, const char *cc_) {
	memcpy(cc, cc_, (n = n_) * sizeof *cc);
}

int query(int i_, int k) {
	int n_, m, i, j;

	n_ = 1 << k;
	if (i_ + n_ > n)
		return 0;
	if (n > 1000 && n_ > 256)
		return 0;
	for (i = 0, j = 1; j < n_; j++) {
		for (m = n_ >> 1; ((i ^= m) & m) == 0; m >>= 1)
			;
		if (cc[i_ + i] != cc[i_ + j])
			return 0;
	}
	return 1;
}

• Subtask 1: 13 / 13
• Subtask 2: 0 / 37
• Subtask 3: 0 / 17
• Subtask 4: 0 / 33