Submission #473645

#	Time	Username	Problem	Language	Result	Execution time	Memory
473645		rainboy	Vrtić (COCI18_vrtic)	C11	80 / 160	1 ms	460 KiB

vrtic

#include <stdio.h>
#include <string.h>

#define N	150
#define M	20

int min(int a, int b) { return a < b ? a : b; }
int max(int a, int b) { return a > b ? a : b; }

unsigned int X = 12345;

int rand_() {
	return (X *= 3) >> 1;
}

void sort(int *xx, int l, int r) {
	while (l < r) {
		int i = l, j = l, k = r, x = xx[l + rand_() % (r - l)], tmp;

		while (j < k)
			if (xx[j] == x)
				j++;
			else if (xx[j] < x) {
				tmp = xx[i], xx[i] = xx[j], xx[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = xx[j], xx[j] = xx[k], xx[k] = tmp;
			}
		sort(xx, l, i);
		l = k;
	}
}

int main() {
	static char visited[N];
	static int pp[N], xx[N], yy[N], ww[N][N], ii[M], cc[M], dp[1 << M];
	int n, g, h, i, j, k, b, m;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d", &pp[i]), pp[i]--;
	m = 0;
	for (i = 0; i < n; i++)
		if (!visited[i]) {
			ii[m] = i;
			while (!visited[i])
				cc[m]++, visited[i] = 1, i = pp[i];
			m++;
		}
	for (i = 0; i < n; i++)
		scanf("%d", &xx[i]);
	sort(xx, 0, n);
	for (i = 0; i < n; i++)
		for (j = i; j < n; j++)
			ww[i][j] = i == j ? 0 : (i + 1 == j ? xx[j] - xx[i] : max(ww[i][j - 1], xx[j] - xx[j - 2]));
	memset(dp, 0x3f, (1 << m) * sizeof *dp), dp[0] = 0;
	for (b = 0; b < 1 << m; b++) {
		k = 0;
		for (h = 0; h < m; h++)
			if ((b & 1 << h) != 0)
				k += cc[h];
		for (h = 0; h < m; h++)
			if ((b & 1 << h) == 0)
				dp[b | 1 << h] = min(dp[b | 1 << h], max(dp[b], ww[k][k + cc[h] - 1]));
	}
	b = (1 << m) - 1, k = n;
	while (b) {
		for (h = 0; h < m; h++)
			if ((b & 1 << h) != 0 && dp[b] == max(dp[b ^ 1 << h], ww[k - cc[h]][k - 1]))
				break;
		i = ii[h];
		for (g = 0; g < cc[h]; g += 2)
			yy[i] = xx[k - 1 - g], i = pp[i];
		for (g = cc[h] % 2 == 0 ? cc[h] - 1 : cc[h] - 2; g >= 0; g -= 2)
			yy[i] = xx[k - 1 - g], i = pp[i];
		b ^= 1 << h, k -= cc[h];
	}
	printf("%d\n", dp[(1 << m) - 1]);
	for (i = 0; i < n; i++)
		printf("%d ", yy[i]);
	printf("\n");
	return 0;
}

Compilation message (stderr)

vrtic.c: In function 'main':
vrtic.c:40:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
vrtic.c:42:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |   scanf("%d", &pp[i]), pp[i]--;
      |   ^~~~~~~~~~~~~~~~~~~
vrtic.c:52:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |   scanf("%d", &xx[i]);
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 16 / 16
• Subtask 2: 16 / 16
• Subtask 3: 16 / 16
• Subtask 4: 16 / 16
• Subtask 5: 16 / 16
• Subtask 6: 0 / 16
• Subtask 7: 0 / 16
• Subtask 8: 0 / 16
• Subtask 9: 0 / 16
• Subtask 10: 0 / 16