oj.uz

Submission #491156

# Submission time Handle Problem Language Result Execution time Memory
491156 2021-11-30T16:20:30 Z rainboy Paint (COI20_paint) C
17 / 100
 3000 ms 10916 KB 
#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 ds[NM], ll[NM], rr[NM];

int find(int i) {
	return ds[i] < 0 ? i : (ds[i] = find(ds[i]));
}

void join(int i, int j) {
	i = find(i);
	j = find(j);
	if (i == j)
		return;
	if (ds[i] > ds[j])
		ds[i] = j, ll[j] = ll[i];
	else {
		if (ds[i] == ds[j])
			ds[i]--;
		ds[j] = i, rr[i] = rr[j];
	}
}

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);
	if (n == 1) {
		for (j = 0; j < m; j++)
			ds[j] = -1, ll[j] = rr[j] = j;
		for (j = 1; j < m; j++)
			if (aa[j] == aa[j - 1])
				join(j - 1, j);
		while (q--) {
			int a, l, r;

			scanf("%*d%d%d", &j, &a), j--;
			aa[find(j)] = a;
			l = ll[find(j)], r = rr[find(j)];
			if (l > 0 && aa[find(l - 1)] == a)
				join(l - 1, j);
			if (r + 1 < m && aa[find(r + 1)] == a)
				join(j, r + 1);
		}
		for (j = 0; j < m; j++)
			printf("%d ", aa[find(j)]);
		printf("\n");
	} else {
		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

paint.c: In function 'main':
paint.c:40:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
paint.c:43:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |    scanf("%d", &aa[i * m + j]);
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~
paint.c:44:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |  scanf("%d", &q);
      |  ^~~~~~~~~~~~~~~
paint.c:54:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |    scanf("%*d%d%d", &j, &a), j--;
      |    ^~~~~~~~~~~~~~~~~~~~~~~~
paint.c:69:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |    scanf("%d%d%d", &i, &j, &c), i--, j--;
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 4 ms 332 KB Output is correct
4 Correct 4 ms 332 KB Output is correct
5 Correct 245 ms 604 KB Output is correct
6 Correct 506 ms 812 KB Output is correct
7 Correct 0 ms 204 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 2124 KB Output is correct
2 Correct 50 ms 3108 KB Output is correct
3 Correct 76 ms 6524 KB Output is correct

Subtask #3
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2596 ms 10916 KB Output is correct
2 Correct 422 ms 7540 KB Output is correct
3 Correct 543 ms 8424 KB Output is correct
4 Execution timed out 3051 ms 7272 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 113 ms 3392 KB Output is correct
2 Execution timed out 3059 ms 6792 KB Time limit exceeded
3 Halted 0 ms 0 KB -