제출 #484297

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
484297		rainboy	Magenta (COCI21_magenta)	C11	0 / 110	9 ms	8908 KiB

Main

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

#define N	100000

int ij[N], cc[N];
int *eh[N], eo[N];

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

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

int dd[N];

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

	dd[i] = d;
	for (o = eo[i]; o--; ) {
		int h = eh[i][o], j = i ^ ij[h];

		if (j != p)
			dfs(i, j, d + 1);
	}
}

int main() {
	int n, u, v, h, i, j;

	scanf("%d%d%d", &n, &u, &v), u--, v--;
	for (i = 0; i < n; i++)
		eh[i] = (int *) malloc(2 * sizeof *eh[i]);
	for (h = 0; h < n - 1; h++) {
		static char s[2];
		int i, j;

		scanf("%d%d%s", &i, &j, s), i--, j--;
		ij[h] = i ^ j, cc[h] = s[h] == 'm' ? 0 : (s[h] == 'b' ? 1 : -1);
		append(i, h), append(j, h);
	}
	dfs(-1, u, 0);
	printf(dd[v] % 2 == 0 ? "Paula\n" : "Marin\n");
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

Main.c: In function 'append':
Main.c:12:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   12 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
Main.c: In function 'main':
Main.c:32:21: warning: unused variable 'j' [-Wunused-variable]
   32 |  int n, u, v, h, i, j;
      |                     ^
Main.c:34:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |  scanf("%d%d%d", &n, &u, &v), u--, v--;
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.c:41:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |   scanf("%d%d%s", &i, &j, s), i--, j--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50