Submission #491108

#	Time	Username	Problem	Language	Result	Execution time	Memory
491108		rainboy	Paint (COI20_paint)	C11	8 / 100	3098 ms	11024 KiB

paint

#include <stdio.h>

#define NM	200000

int aa[NM], n, m;

void dfs(int i, int j, int a, int c) {
	if (i < 0 || i >= n || j < 0 || j >= m || aa[i * m + j] != a)
		return;
	aa[i * m + j] = c;
	dfs(i - 1, j, a, c);
	dfs(i + 1, j, a, c);
	dfs(i, j - 1, a, c);
	dfs(i, j + 1, a, c);
}

int main() {
	int q, i, j;

	scanf("%d%d", &n, &m);
	for (i = 0; i < n; i++)
		for (j = 0; j < m; j++)
			scanf("%d", &aa[i * m + j]);
	scanf("%d", &q);
	while (q--) {
		int c;

		scanf("%d%d%d", &i, &j, &c), i--, j--;
		if (aa[i * m + j] != c)
			dfs(i, j, aa[i * m + j], c);
	}
	for (i = 0; i < n; i++) {
		for (j = 0; j < m; j++)
			printf("%d ", aa[i * m + j]);
		printf("\n");
	}
	return 0;
}

Compilation message (stderr)

paint.c: In function 'main':
paint.c:20:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
paint.c:23:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |    scanf("%d", &aa[i * m + j]);
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~
paint.c:24:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |  scanf("%d", &q);
      |  ^~~~~~~~~~~~~~~
paint.c:28:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |   scanf("%d%d%d", &i, &j, &c), i--, j--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 31
• Subtask 4: 0 / 52