Submission #917336

#	Time	Username	Problem	Language	Result	Execution time	Memory
917336		rainboy	줄서기 (KOI17_line)	C++98	100 / 100	154 ms	21836 KiB

line

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

#define N	100000

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

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

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

int main() {
	static int aa[N];
	int n, m, h, i, j, o;

	scanf("%d%d", &n, &m);
	for (j = 0; j < n; j++)
		ei[j] = (int *) malloc(2 * sizeof *ei[j]);
	for (h = 0; h < m; h++) {
		scanf("%d%d", &i, &j), i--, j--;
		append(j, i);
	}
	for (j = 0; j < n; j++) {
		for (o = eo[j]; o--; ) {
			i = ei[j][o];
			if (aa[i]++ < j - eo[j]) {
				printf("-1\n");
				return 0;
			}
		}
		aa[j] = j - eo[j];
	}
	for (i = 0; i < n; i++)
		printf("%d ", aa[i] + 1);
	printf("\n");
	return 0;
}

Compilation message (stderr)

line.cpp: In function 'void append(int, int)':
line.cpp:11:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   11 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
line.cpp: In function 'int main()':
line.cpp:20:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |  scanf("%d%d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~
line.cpp:24:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |   scanf("%d%d", &i, &j), i--, j--;
      |   ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 21 / 21
• Subtask 3: 30 / 30
• Subtask 4: 42 / 42