Submission #722676

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
722676	2023-04-12T14:58:44 Z	rainboy	Human Error (CCO19_day1problem1)	C	25 / 25	29 ms	4180 KB

Main

#include <stdio.h>

#define NM	13
#define P	1594323

int min(int a, int b) { return a < b ? a : b; }

unsigned int X = 12345;

int rand_() {
	return (X *= 3) >> 1;
}

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

int pp3[NM + 1];

void init() {
	int i;

	pp3[0] = 1;
	for (i = 1; i <= NM; i++)
		pp3[i] = pp3[i - 1] * 3;
}

char digit(int b, int h) {
	return b / pp3[h] % 3;
}

double dp[P]; char visited[P]; int n, m, k1, k2;

void sort(double *aa, int l, int r) {
	while (l < r) {
		int i = l, j = l, k = r;
		double a = aa[l + rand_() % (r - l)], tmp;

		while (j < k)
			if (aa[j] == a)
				j++;
			else if (aa[j] < a) {
				tmp = aa[i], aa[i] = aa[j], aa[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = aa[j], aa[j] = aa[k], aa[k] = tmp;
			}
		sort(aa, l, i);
		l = k;
	}
}

double solve(int b, int turn) {
	static double aa[NM * 4];
	int k, g, h, h_, i, i_, j, j_, d;

	if (!visited[b]) {
		visited[b] = 1;
		for (i = 0; i < n; i++)
			for (j = 0; j < m; j++) {
				h = i * m + j;
				if (digit(b, h) == turn)
					for (g = 0; g < 4; g++) {
						i_ = i + di[g], j_ = j + dj[g], h_ = i_ * m + j_;
						if (i_ >= 0 && i_ < n && j_ >= 0 && j_ < m && (d = digit(b, h_)) != 0)
							solve(b - turn * pp3[h] + (turn - d) * pp3[h_], turn ^ 3);
					}
			}
		k = 0;
		for (i = 0; i < n; i++)
			for (j = 0; j < m; j++) {
				h = i * m + j;
				if (digit(b, h) == turn)
					for (g = 0; g < 4; g++) {
						i_ = i + di[g], j_ = j + dj[g], h_ = i_ * m + j_;
						if (i_ >= 0 && i_ < n && j_ >= 0 && j_ < m && (d = digit(b, h_)) != 0)
							aa[k++] = solve(b - turn * pp3[h] + (turn - d) * pp3[h_], turn ^ 3);
					}
			}
		sort(aa, 0, k);
		k = min(k, turn == 1 ? k1 : k2);
		dp[b] = 0;
		if (k != 0) {
			for (g = 0; g < k; g++)
				dp[b] += 1 - aa[g];
			dp[b] /= k;
		}
	}
	return dp[b];
}

int main() {
	static char cc[NM + 1];
	int i, j, h, b;

	init();
	scanf("%d%d", &n, &m);
	for (i = 0; i < n; i++)
		scanf("%s", cc + i * m);
	scanf("%d%d", &k1, &k2);
	b = 0;
	for (i = 0; i < n; i++)
		for (j = 0; j < m; j++) {
			h = i * m + j;
			if (cc[h] == 'J')
				b += pp3[h];
			else if (cc[h] == 'D')
				b += pp3[h] * 2;
		}
	printf("%.3f\n", solve(b, 1));
	return 0;
}

Compilation message

Main.c: In function 'main':
Main.c:97:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
Main.c:99:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |   scanf("%s", cc + i * m);
      |   ^~~~~~~~~~~~~~~~~~~~~~~
Main.c:100:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |  scanf("%d%d", &k1, &k2);
      |  ^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1

25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	2 ms	340 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	29 ms	2968 KB	Output is correct
6	Correct	9 ms	3216 KB	Output is correct
7	Correct	18 ms	3408 KB	Output is correct
8	Correct	18 ms	3140 KB	Output is correct
9	Correct	27 ms	3740 KB	Output is correct
10	Correct	23 ms	3600 KB	Output is correct
11	Correct	26 ms	3916 KB	Output is correct
12	Correct	22 ms	3676 KB	Output is correct
13	Correct	21 ms	3948 KB	Output is correct
14	Correct	18 ms	3432 KB	Output is correct
15	Correct	24 ms	3544 KB	Output is correct
16	Correct	7 ms	3156 KB	Output is correct
17	Correct	12 ms	3816 KB	Output is correct
18	Correct	9 ms	2580 KB	Output is correct
19	Correct	6 ms	4180 KB	Output is correct
20	Correct	9 ms	3000 KB	Output is correct
21	Correct	9 ms	4052 KB	Output is correct
22	Correct	12 ms	3412 KB	Output is correct
23	Correct	12 ms	2688 KB	Output is correct
24	Correct	17 ms	2976 KB	Output is correct
25	Correct	26 ms	3284 KB	Output is correct
26	Correct	17 ms	2912 KB	Output is correct
27	Correct	25 ms	3144 KB	Output is correct
28	Correct	0 ms	212 KB	Output is correct
29	Correct	7 ms	3284 KB	Output is correct
30	Correct	6 ms	2772 KB	Output is correct
31	Correct	7 ms	2200 KB	Output is correct
32	Correct	8 ms	2108 KB	Output is correct
33	Correct	1 ms	340 KB	Output is correct
34	Correct	1 ms	340 KB	Output is correct
35	Correct	1 ms	340 KB	Output is correct
36	Correct	1 ms	340 KB	Output is correct
37	Correct	1 ms	340 KB	Output is correct
38	Correct	1 ms	340 KB	Output is correct
39	Correct	2 ms	340 KB	Output is correct
40	Correct	1 ms	340 KB	Output is correct
41	Correct	2 ms	340 KB	Output is correct
42	Correct	2 ms	340 KB	Output is correct
43	Correct	14 ms	2648 KB	Output is correct
44	Correct	16 ms	2772 KB	Output is correct
45	Correct	10 ms	1952 KB	Output is correct
46	Correct	13 ms	2644 KB	Output is correct
47	Correct	12 ms	2188 KB	Output is correct
48	Correct	10 ms	2444 KB	Output is correct
49	Correct	12 ms	2492 KB	Output is correct
50	Correct	0 ms	212 KB	Output is correct