답안 #940806

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
940806	2024-03-07T16:30:33 Z	rainboy	Company Planning (TOKI14_company)	C	100 / 100	92 ms	10328 KB

company

#include <stdio.h>
#include <stdlib.h>

#define N	100000

unsigned int X = 12345;

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

int *ej[N], eo[N];

void append(int i, int j) {
	int o = eo[i]++;

	if (o >= 2 && (o & o - 1) == 0)
		ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
	ej[i][o] = j;
}

int dp[N], k;

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

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

void dfs(int i) {
	int o;

	for (o = eo[i]; o--; ) {
		int j = ej[i][o];

		dfs(j);
	}
	sort(ej[i], 0, eo[i]);
	dp[i] = 1;
	for (o = eo[i] - 1; o >= 0 && o >= eo[i] - k; o--)
		dp[i] += dp[ej[i][o]];
}

int main() {
	int n, m, i, j, lower, upper;

	scanf("%d%d", &n, &m);
	for (i = 0; i < n; i++)
		ej[i] = (int *) malloc(2 * sizeof *ej[i]);
	for (j = 1; j < n; j++) {
		scanf("%d", &i), i--;
		append(i, j);
	}
	lower = -1, upper = n - 1;
	while (upper - lower > 1) {
		k = (lower + upper) / 2;
		dfs(0);
		if (dp[0] >= m)
			upper = k;
		else
			lower = k;
	}
	printf("%d\n", upper);
	return 0;
}

Compilation message

company.c: In function 'append':
company.c:17:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   17 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
company.c: In function 'main':
company.c:60:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
company.c:64:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |   scanf("%d", &i), i--;
      |   ^~~~~~~~~~~~~~~

Subtask #1

12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	432 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	756 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	428 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	348 KB	Output is correct
24	Correct	0 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct

Subtask #2

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	348 KB	Output is correct
5	Correct	1 ms	428 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	344 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	1 ms	344 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	1 ms	348 KB	Output is correct
23	Correct	0 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	0 ms	348 KB	Output is correct
29	Correct	0 ms	428 KB	Output is correct
30	Correct	0 ms	348 KB	Output is correct
31	Correct	0 ms	348 KB	Output is correct
32	Correct	1 ms	348 KB	Output is correct
33	Correct	0 ms	348 KB	Output is correct
34	Correct	0 ms	352 KB	Output is correct
35	Correct	0 ms	348 KB	Output is correct
36	Correct	1 ms	348 KB	Output is correct
37	Correct	0 ms	348 KB	Output is correct

Subtask #3

18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	74 ms	4956 KB	Output is correct
3	Correct	24 ms	5468 KB	Output is correct
4	Correct	25 ms	5464 KB	Output is correct
5	Correct	76 ms	5468 KB	Output is correct
6	Correct	64 ms	5212 KB	Output is correct
7	Correct	61 ms	5016 KB	Output is correct
8	Correct	58 ms	4696 KB	Output is correct
9	Correct	64 ms	5148 KB	Output is correct
10	Correct	52 ms	4444 KB	Output is correct
11	Correct	58 ms	4700 KB	Output is correct
12	Correct	73 ms	5600 KB	Output is correct
13	Correct	69 ms	5468 KB	Output is correct
14	Correct	40 ms	3416 KB	Output is correct
15	Correct	80 ms	5148 KB	Output is correct
16	Correct	41 ms	3672 KB	Output is correct
17	Correct	56 ms	4444 KB	Output is correct
18	Correct	29 ms	2648 KB	Output is correct
19	Correct	10 ms	2392 KB	Output is correct
20	Correct	20 ms	4620 KB	Output is correct
21	Correct	15 ms	3416 KB	Output is correct
22	Correct	6 ms	1628 KB	Output is correct
23	Correct	20 ms	4444 KB	Output is correct
24	Correct	22 ms	4956 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct

Subtask #4

7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	21 ms	5212 KB	Output is correct
3	Correct	20 ms	5448 KB	Output is correct
4	Correct	35 ms	5668 KB	Output is correct
5	Correct	47 ms	5720 KB	Output is correct
6	Correct	32 ms	5284 KB	Output is correct
7	Correct	40 ms	10176 KB	Output is correct
8	Correct	71 ms	5720 KB	Output is correct
9	Correct	72 ms	5600 KB	Output is correct
10	Correct	57 ms	4696 KB	Output is correct
11	Correct	22 ms	2140 KB	Output is correct
12	Correct	66 ms	5040 KB	Output is correct
13	Correct	45 ms	3672 KB	Output is correct
14	Correct	68 ms	5076 KB	Output is correct
15	Correct	71 ms	5668 KB	Output is correct
16	Correct	34 ms	2908 KB	Output is correct
17	Correct	32 ms	2908 KB	Output is correct
18	Correct	51 ms	4188 KB	Output is correct
19	Correct	58 ms	4444 KB	Output is correct
20	Correct	28 ms	2464 KB	Output is correct
21	Correct	15 ms	1624 KB	Output is correct
22	Correct	16 ms	4760 KB	Output is correct
23	Correct	28 ms	6492 KB	Output is correct
24	Correct	22 ms	6236 KB	Output is correct
25	Correct	17 ms	3140 KB	Output is correct
26	Correct	35 ms	4956 KB	Output is correct
27	Correct	26 ms	5212 KB	Output is correct
28	Correct	20 ms	3416 KB	Output is correct
29	Correct	21 ms	4700 KB	Output is correct
30	Correct	27 ms	4444 KB	Output is correct
31	Correct	28 ms	4664 KB	Output is correct
32	Correct	13 ms	1628 KB	Output is correct
33	Correct	8 ms	2396 KB	Output is correct
34	Correct	9 ms	2652 KB	Output is correct
35	Correct	2 ms	856 KB	Output is correct

Subtask #5

43.0 / 43.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	18 ms	5212 KB	Output is correct
3	Correct	19 ms	5212 KB	Output is correct
4	Correct	36 ms	5492 KB	Output is correct
5	Correct	38 ms	5468 KB	Output is correct
6	Correct	33 ms	5464 KB	Output is correct
7	Correct	54 ms	10308 KB	Output is correct
8	Correct	73 ms	5724 KB	Output is correct
9	Correct	23 ms	5468 KB	Output is correct
10	Correct	21 ms	5212 KB	Output is correct
11	Correct	43 ms	5656 KB	Output is correct
12	Correct	38 ms	5468 KB	Output is correct
13	Correct	29 ms	5456 KB	Output is correct
14	Correct	43 ms	10328 KB	Output is correct
15	Correct	74 ms	5720 KB	Output is correct
16	Correct	92 ms	5468 KB	Output is correct
17	Correct	78 ms	5468 KB	Output is correct
18	Correct	70 ms	5464 KB	Output is correct
19	Correct	55 ms	4576 KB	Output is correct
20	Correct	51 ms	4148 KB	Output is correct
21	Correct	62 ms	4424 KB	Output is correct
22	Correct	14 ms	1624 KB	Output is correct
23	Correct	50 ms	4196 KB	Output is correct
24	Correct	20 ms	2140 KB	Output is correct
25	Correct	30 ms	2652 KB	Output is correct
26	Correct	32 ms	2960 KB	Output is correct
27	Correct	66 ms	4868 KB	Output is correct
28	Correct	79 ms	5160 KB	Output is correct
29	Correct	68 ms	5292 KB	Output is correct
30	Correct	6 ms	860 KB	Output is correct
31	Correct	14 ms	1372 KB	Output is correct
32	Correct	70 ms	5376 KB	Output is correct
33	Correct	64 ms	5020 KB	Output is correct
34	Correct	14 ms	1628 KB	Output is correct
35	Correct	68 ms	5208 KB	Output is correct
36	Correct	74 ms	5468 KB	Output is correct
37	Correct	57 ms	4440 KB	Output is correct
38	Correct	53 ms	3920 KB	Output is correct
39	Correct	70 ms	5468 KB	Output is correct
40	Correct	5 ms	856 KB	Output is correct
41	Correct	29 ms	2652 KB	Output is correct
42	Correct	32 ms	8540 KB	Output is correct
43	Correct	20 ms	4188 KB	Output is correct
44	Correct	25 ms	6696 KB	Output is correct
45	Correct	39 ms	4952 KB	Output is correct
46	Correct	8 ms	1880 KB	Output is correct
47	Correct	33 ms	7260 KB	Output is correct
48	Correct	35 ms	8792 KB	Output is correct
49	Correct	44 ms	9820 KB	Output is correct
50	Correct	34 ms	5212 KB	Output is correct
51	Correct	18 ms	3164 KB	Output is correct
52	Correct	18 ms	4052 KB	Output is correct
53	Correct	20 ms	4444 KB	Output is correct
54	Correct	11 ms	2704 KB	Output is correct
55	Correct	26 ms	4216 KB	Output is correct
56	Correct	20 ms	3452 KB	Output is correct
57	Correct	56 ms	4676 KB	Output is correct
58	Correct	11 ms	2652 KB	Output is correct
59	Correct	14 ms	2924 KB	Output is correct
60	Correct	21 ms	4692 KB	Output is correct
61	Correct	12 ms	2388 KB	Output is correct
62	Correct	20 ms	3416 KB	Output is correct
63	Correct	30 ms	2648 KB	Output is correct
64	Correct	17 ms	4436 KB	Output is correct
65	Correct	20 ms	4692 KB	Output is correct
66	Correct	10 ms	3164 KB	Output is correct
67	Correct	9 ms	2648 KB	Output is correct
68	Correct	15 ms	4436 KB	Output is correct
69	Correct	8 ms	2652 KB	Output is correct
70	Correct	14 ms	4320 KB	Output is correct
71	Correct	9 ms	2904 KB	Output is correct
72	Correct	0 ms	344 KB	Output is correct