oj.uz

Submission #696177

# Submission time Handle Problem Language Result Execution time Memory
696177 2023-02-05T17:30:18 Z rainboy None (JOI16_skating) C
100 / 100
 1530 ms 11304 KB 
#include <stdio.h>
#include <string.h>

#define N	1000
#define M	1000

int di[] = { -1, 1, 0, 0 };
int dj[] = { 0, 0, -1, 1 };

int main() {
	static char cc[N][M + 1];
	static int dd[N * M], qu1[N * M], qu2[N * M];
	int n, m, cnt1, cnt2, g, h1, h2, is, js, it, jt, i, j, i_, j_, ij, ij_, d;

	scanf("%d%d", &n, &m);
	for (i = 0; i < n; i++)
		scanf("%s", cc[i]);
	scanf("%d%d%d%d", &is, &js, &it, &jt), is--, js--, it--, jt--;
	memset(dd, 0x3f, n * m * sizeof *dd);
	cnt1 = cnt2 = 0, h1 = h2 = 0;
	ij = is * m + js;
	dd[ij] = 0, qu1[cnt1++] = ij;
	while (h1 < cnt1 || h2 < cnt2) {
		ij = h2 == cnt2 || h1 < cnt1 && dd[qu1[h1]] < dd[qu2[h2]] ? qu1[h1++] : qu2[h2++], i = ij / m, j = ij % m, d = dd[ij];
		if (i == it && j == jt) {
			printf("%d\n", d);
			return 0;
		}
		for (g = 0; g < 4; g++) {
			i_ = i + di[g], j_ = j + dj[g], ij_ = i_ * m + j_;
			if (cc[i_][j_] == '#')
				continue;
			if (dd[ij_] > d + 2)
				dd[ij_] = d + 2, qu2[cnt2++] = ij_;
			while (cc[i_][j_] != '#')
				i_ += di[g], j_ += dj[g];
			i_ -= di[g], j_ -= dj[g];
			ij_ = i_ * m + j_;
			if (dd[ij_] > d + 1)
				dd[ij_] = d + 1, qu1[cnt1++] = ij_;
		}
	}
	printf("-1\n");
	return 0;
}

Compilation message

skating.c: In function 'main':
skating.c:24:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   24 |   ij = h2 == cnt2 || h1 < cnt1 && dd[qu1[h1]] < dd[qu2[h2]] ? qu1[h1++] : qu2[h2++], i = ij / m, j = ij % m, d = dd[ij];
      |                      ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
skating.c:15:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
skating.c:17:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   scanf("%s", cc[i]);
      |   ^~~~~~~~~~~~~~~~~~
skating.c:18:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |  scanf("%d%d%d%d", &is, &js, &it, &jt), is--, js--, it--, jt--;
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #2
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 8 ms 724 KB Output is correct
12 Correct 9 ms 820 KB Output is correct
13 Correct 3 ms 724 KB Output is correct
14 Correct 4 ms 696 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 7 ms 820 KB Output is correct
17 Correct 4 ms 724 KB Output is correct
18 Correct 3 ms 724 KB Output is correct
19 Correct 4 ms 724 KB Output is correct
20 Correct 4 ms 724 KB Output is correct
21 Correct 2 ms 912 KB Output is correct
22 Correct 3 ms 704 KB Output is correct
23 Correct 4 ms 724 KB Output is correct
24 Correct 6 ms 852 KB Output is correct
25 Correct 3 ms 724 KB Output is correct
26 Correct 4 ms 724 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 8 ms 724 KB Output is correct
12 Correct 9 ms 820 KB Output is correct
13 Correct 3 ms 724 KB Output is correct
14 Correct 4 ms 696 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 7 ms 820 KB Output is correct
17 Correct 4 ms 724 KB Output is correct
18 Correct 3 ms 724 KB Output is correct
19 Correct 4 ms 724 KB Output is correct
20 Correct 4 ms 724 KB Output is correct
21 Correct 2 ms 912 KB Output is correct
22 Correct 3 ms 704 KB Output is correct
23 Correct 4 ms 724 KB Output is correct
24 Correct 6 ms 852 KB Output is correct
25 Correct 3 ms 724 KB Output is correct
26 Correct 4 ms 724 KB Output is correct
27 Correct 752 ms 8100 KB Output is correct
28 Correct 1187 ms 9752 KB Output is correct
29 Correct 11 ms 6228 KB Output is correct
30 Correct 48 ms 7596 KB Output is correct
31 Correct 5 ms 6136 KB Output is correct
32 Correct 1530 ms 10160 KB Output is correct
33 Correct 17 ms 2472 KB Output is correct
34 Correct 41 ms 7256 KB Output is correct
35 Correct 224 ms 8964 KB Output is correct
36 Correct 76 ms 8688 KB Output is correct
37 Correct 28 ms 6948 KB Output is correct
38 Correct 473 ms 9932 KB Output is correct
39 Correct 40 ms 11304 KB Output is correct
40 Correct 194 ms 7360 KB Output is correct