Submission #481205

#	Time	Username	Problem	Language	Result	Execution time	Memory
481205		rainboy	Sob (COCI19_sob)	C11	10 / 110	52 ms	5784 KiB

sob

#include <stdio.h>

#define N	1000000

void solve(int *aa, int *bb, int l, int r) {
	int n = r - l, m = n / 2, i;

	if (n == 1)
		aa[0] = 0, bb[0] = l;
	else if (n % 2 == 0 && l % 2 == 0) {
		solve(aa, bb, l / 2, l / 2 + m), solve(aa + m, bb + m, l / 2, l / 2 + m);
		for (i = 0; i < n; i++)
			aa[i] <<= 1, bb[i] <<= 1;
		for (i = 0; i < m; i++)
			aa[m + i] |= 1, bb[m + i] |= 1;
	} else if (n % 2 == 0 && l % 2 == 1) {
		solve(aa, bb, l / 2, l / 2 + m), solve(aa + m, bb + m, l / 2 + 1, l / 2 + 1 + m);
		for (i = 0; i < n; i++)
			aa[i] <<= 1, bb[i] <<= 1;
		for (i = 0; i < m; i++)
			aa[i] |= 1, bb[i] |= 1;
	} else if (n % 2 == 1 && l % 2 == 0) {
		solve(aa, bb, l / 2, l / 2 + m + 1), solve(aa + m + 1, bb + m + 1, l / 2, l / 2 + m);
		for (i = 0; i < n; i++)
			aa[i] <<= 1, bb[i] <<= 1;
		for (i = 0; i < m; i++)
			aa[m + 1 + i] |= 1, bb[m + 1 + i] |= 1;
	} else {
		solve(aa, bb, l / 2, l / 2 + m + 1), solve(aa + m + 1, bb + m + 1, l / 2 + 1, l / 2 + m + 1);
		for (i = 0; i < n; i++)
			aa[i] <<= 1, bb[i] <<= 1;
		for (i = 0; i < m; i++)
			aa[m + 1 + i] |= 1, bb[m + 1 + i] |= 1;
		for (i = 0; i < m + 1; i++)
			if (aa[i] == l - 1) {
				bb[i] |= 1;
				break;
			}
	}
}

int main() {
	static int aa[N], bb[N];
	int n, m, i;

	scanf("%d%d", &n, &m);
	solve(aa, bb, m, m + n);
	for (i = 0; i < n; i++)
		printf("%d %d\n", aa[i], bb[i]);
	return 0;
}

Compilation message (stderr)

sob.c: In function 'main':
sob.c:46:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 29
• Subtask 3: 0 / 39
• Subtask 4: 0 / 32