Submission #722675

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
722675	2023-04-12T14:52:23 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];
	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	0 ms	292 KB	Output is correct
3	Correct	1 ms	448 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	27 ms	3000 KB	Output is correct
6	Correct	9 ms	3156 KB	Output is correct
7	Correct	18 ms	3424 KB	Output is correct
8	Correct	18 ms	3108 KB	Output is correct
9	Correct	26 ms	3668 KB	Output is correct
10	Correct	20 ms	3540 KB	Output is correct
11	Correct	29 ms	3856 KB	Output is correct
12	Correct	23 ms	3676 KB	Output is correct
13	Correct	20 ms	3848 KB	Output is correct
14	Correct	19 ms	3536 KB	Output is correct
15	Correct	23 ms	3540 KB	Output is correct
16	Correct	7 ms	3156 KB	Output is correct
17	Correct	11 ms	3880 KB	Output is correct
18	Correct	8 ms	2516 KB	Output is correct
19	Correct	7 ms	4180 KB	Output is correct
20	Correct	9 ms	2976 KB	Output is correct
21	Correct	10 ms	4056 KB	Output is correct
22	Correct	11 ms	3412 KB	Output is correct
23	Correct	14 ms	2704 KB	Output is correct
24	Correct	19 ms	3080 KB	Output is correct
25	Correct	26 ms	3292 KB	Output is correct
26	Correct	18 ms	2840 KB	Output is correct
27	Correct	27 ms	3108 KB	Output is correct
28	Correct	0 ms	212 KB	Output is correct
29	Correct	8 ms	3284 KB	Output is correct
30	Correct	6 ms	2772 KB	Output is correct
31	Correct	6 ms	2208 KB	Output is correct
32	Correct	6 ms	2120 KB	Output is correct
33	Correct	1 ms	340 KB	Output is correct
34	Correct	1 ms	420 KB	Output is correct
35	Correct	1 ms	340 KB	Output is correct
36	Correct	1 ms	416 KB	Output is correct
37	Correct	1 ms	340 KB	Output is correct
38	Correct	1 ms	420 KB	Output is correct
39	Correct	1 ms	340 KB	Output is correct
40	Correct	1 ms	340 KB	Output is correct
41	Correct	1 ms	340 KB	Output is correct
42	Correct	1 ms	340 KB	Output is correct
43	Correct	15 ms	2672 KB	Output is correct
44	Correct	17 ms	2840 KB	Output is correct
45	Correct	10 ms	1992 KB	Output is correct
46	Correct	14 ms	2604 KB	Output is correct
47	Correct	12 ms	2132 KB	Output is correct
48	Correct	11 ms	2416 KB	Output is correct
49	Correct	12 ms	2516 KB	Output is correct
50	Correct	0 ms	292 KB	Output is correct