Submission #1072969

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1072969	2024-08-24T07:54:20 Z	rainboy	Infiltration (CCO24_day2problem1)	C	22 / 25	5 ms	860 KB

Main

#include <stdio.h>
#include <stdlib.h>

#define N	100
#define M	(N * 4)

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

int *ej[N], eo[N];

void append(int i, int j) {
	int o = eo[i]++;

	if (o >= 2 && (o & o - 1) == 0)
		ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
	ej[i][o] = j;
}

int pp[N];

void dfs(int p, int i) {
	int o;

	pp[i] = p;
	for (o = eo[i]; o--; ) {
		int j = ej[i][o];

		if (j != p)
			dfs(i, j);
	}
}

int main() {
	static int iii[2][N][M + 1], mm[2][N];
	int n, m, h, i, j, t, l;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		ej[i] = (int *) malloc(2 * sizeof *ej[i]);
	for (h = 0; h < n - 1; h++) {
		scanf("%d%d", &i, &j);
		append(i, j), append(j, i);
	}
	dfs(-1, 0);
	m = 0;
	for (t = 0; t < 2; t++) {
		for (i = 0; i < n; i++) {
			mm[t][i] = 0, iii[t][i][mm[t][i]] = j = i, l = 0;
			for (l = 0; j != 0; l++)
				if (l % 2 == t)
					for (h = 0; h < 1 << l && j != 0; h++)
						iii[t][i][++mm[t][i]] = j = pp[j];
				else
					for (h = 0; h < 1 << l; h++)
						iii[t][i][++mm[t][i]] = j;
			m = max(m, mm[t][i]);
		}
	}
	printf("%d\n", m * 2);
	for (t = 0; t < 2; t++)
		for (i = 0; i < n; i++)
			for (h = 1; h <= m * 2; h++)
				printf("%d%c", iii[t][i][(h + 1 - t) / 2], h < m * 2 ? ' ' : '\n');
	return 0;
}

Compilation message

Main.c: In function 'append':
Main.c:14:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   14 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
Main.c: In function 'main':
Main.c:37:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
Main.c:41:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |   scanf("%d%d", &i, &j);
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1

22.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Partially correct	5 ms	860 KB	Partially correct
2	Partially correct	3 ms	860 KB	Partially correct
3	Partially correct	3 ms	860 KB	Partially correct
4	Partially correct	4 ms	840 KB	Partially correct
5	Partially correct	4 ms	860 KB	Partially correct
6	Partially correct	4 ms	860 KB	Partially correct
7	Correct	1 ms	600 KB	Output is correct
8	Correct	0 ms	604 KB	Output is correct
9	Correct	0 ms	604 KB	Output is correct
10	Correct	0 ms	604 KB	Output is correct
11	Correct	0 ms	604 KB	Output is correct
12	Correct	0 ms	604 KB	Output is correct
13	Correct	1 ms	604 KB	Output is correct
14	Correct	0 ms	604 KB	Output is correct
15	Correct	0 ms	600 KB	Output is correct
16	Correct	2 ms	604 KB	Output is correct
17	Correct	2 ms	604 KB	Output is correct
18	Correct	1 ms	604 KB	Output is correct
19	Correct	1 ms	600 KB	Output is correct
20	Correct	1 ms	604 KB	Output is correct
21	Correct	1 ms	604 KB	Output is correct
22	Partially correct	2 ms	604 KB	Partially correct
23	Partially correct	2 ms	604 KB	Partially correct
24	Partially correct	3 ms	604 KB	Partially correct
25	Partially correct	4 ms	860 KB	Partially correct