oj.uz

답안 #545492

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
545492 2022-04-04T15:49:23 Z rainboy 우주 해적 (JOI14_space_pirate) C
47 / 100
 2000 ms 77724 KB 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define N	100000
#define L	60	/* L = ceil(log2(10^18)) */

int *ej[N], eo[N], pp[N], pp_[L + 1][N], ii[N + 1], tt[N], tt_[N], n; long long cc[N], cc_[L + 1][N], k;

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;
}

void dfs1(int i, int t) {
	int o;

	if (tt_[i] != -1)
		return;
	tt_[i] = t;
	for (o = eo[i]; o--; ) {
		int j = ej[i][o];

		dfs1(j, t);
	}
}

void update(int i, long long k, int x) {
	int l;

	for (l = L; l >= 0; l--)
		if (k >= 1LL << l)
			cc_[l][i] += x, k -= 1LL << l, i = pp_[l][i];
}

int qu[N * 2];

void dfs2(int p, int i, int h_, int cnt) {
	int o, h;

	qu[cnt++] = i;
	for (h = cnt - 1; h >= h_; h--)
		if (tt[qu[h]] != -1)
			cc[qu[cnt - 1 - (k - tt[qu[h]] - 1) % (cnt - h)]]++;
	for (o = eo[i]; o--; ) {
		int j = ej[i][o];

		if (j != p)
			dfs2(i, j, h_, cnt);
	}
}

int main() {
	int h, i, i_, j, t, l, cnt;
	long long k_;

	scanf("%d%lld", &n, &k);
	for (i = 0; i < n; i++)
		ej[i] = (int *) malloc(2 * sizeof *ej[i]);
	for (i = 0; i < n; i++) {
		scanf("%d", &pp[i]), pp[i]--;
		append(pp[i], i);
	}
	for (i = 0; i < n; i++)
		pp_[0][i] = pp[i];
	for (l = 1; l <= L; l++)
		for (i = 0; i < n; i++)
			pp_[l][i] = pp_[l - 1][pp_[l - 1][i]];
	memset(tt, -1, n * sizeof *tt), memset(tt_, -1, n * sizeof *tt_);
	for (i = 0, t = 0; tt[i] == -1; i = pp[i], t++)
		ii[tt[i] = t] = i, dfs1(i, t);
	ii[t] = i_ = i;
	for (i = 0; i < n; i++)
		if (tt_[i] == -1)
			tt_[i] = t;
	j = i_, k_ = (k - t) % (t - tt[i_]);
	while (k_--)
		j = pp[j];
	for (i = 0; i < n; i++)
		if (tt[i] == -1)
			cc[j] += n;
	for (i = 0; i < n; i++)
		update(i, k, 1), update(i, k - tt_[i], -1);
	cnt = 0;
	for (h = t - 1; h > tt[i_]; h--)
		qu[cnt++] = ii[h];
	for (h = t; h > tt[i_]; h--)
		dfs2(ii[h - 1], ii[h], cnt - (t - tt[i_]) + 1, cnt), qu[cnt++] = ii[h];
	for (l = L; l > 0; l--)
		for (i = 0; i < n; i++)
			cc_[l - 1][i] += cc_[l][i], cc_[l - 1][pp_[l - 1][i]] += cc_[l][i];
	for (i = 0; i < n; i++)
		cc[i] += cc_[0][i];
	for (i = 0; i < n; i++)
		printf("%lld\n", cc[i]);
	return 0;
}

Compilation message

space_pirate.c: In function 'append':
space_pirate.c:13:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   13 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
space_pirate.c: In function 'main':
space_pirate.c:60:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |  scanf("%d%lld", &n, &k);
      |  ^~~~~~~~~~~~~~~~~~~~~~~
space_pirate.c:64:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |   scanf("%d", &pp[i]), pp[i]--;
      |   ^~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Correct 1 ms 980 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 1 ms 992 KB Output is correct
9 Correct 1 ms 980 KB Output is correct
10 Correct 1 ms 980 KB Output is correct
11 Correct 1 ms 980 KB Output is correct
12 Correct 1 ms 980 KB Output is correct
13 Correct 1 ms 980 KB Output is correct
14 Correct 1 ms 980 KB Output is correct

Subtask #2
37.0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Correct 1 ms 980 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 1 ms 992 KB Output is correct
9 Correct 1 ms 980 KB Output is correct
10 Correct 1 ms 980 KB Output is correct
11 Correct 1 ms 980 KB Output is correct
12 Correct 1 ms 980 KB Output is correct
13 Correct 1 ms 980 KB Output is correct
14 Correct 1 ms 980 KB Output is correct
15 Correct 6 ms 3156 KB Output is correct
16 Correct 4 ms 3156 KB Output is correct
17 Correct 10 ms 3188 KB Output is correct
18 Correct 167 ms 3332 KB Output is correct
19 Correct 49 ms 3356 KB Output is correct
20 Correct 88 ms 3360 KB Output is correct
21 Correct 95 ms 3472 KB Output is correct
22 Correct 34 ms 3352 KB Output is correct
23 Correct 91 ms 3436 KB Output is correct
24 Correct 24 ms 3292 KB Output is correct
25 Correct 4 ms 3156 KB Output is correct
26 Correct 170 ms 3448 KB Output is correct
27 Correct 38 ms 3232 KB Output is correct
28 Correct 61 ms 3244 KB Output is correct

Subtask #3
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 436 ms 77724 KB Output is correct
2 Execution timed out 2095 ms 56220 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Correct 1 ms 980 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 980 KB Output is correct
8 Correct 1 ms 992 KB Output is correct
9 Correct 1 ms 980 KB Output is correct
10 Correct 1 ms 980 KB Output is correct
11 Correct 1 ms 980 KB Output is correct
12 Correct 1 ms 980 KB Output is correct
13 Correct 1 ms 980 KB Output is correct
14 Correct 1 ms 980 KB Output is correct
15 Correct 6 ms 3156 KB Output is correct
16 Correct 4 ms 3156 KB Output is correct
17 Correct 10 ms 3188 KB Output is correct
18 Correct 167 ms 3332 KB Output is correct
19 Correct 49 ms 3356 KB Output is correct
20 Correct 88 ms 3360 KB Output is correct
21 Correct 95 ms 3472 KB Output is correct
22 Correct 34 ms 3352 KB Output is correct
23 Correct 91 ms 3436 KB Output is correct
24 Correct 24 ms 3292 KB Output is correct
25 Correct 4 ms 3156 KB Output is correct
26 Correct 170 ms 3448 KB Output is correct
27 Correct 38 ms 3232 KB Output is correct
28 Correct 61 ms 3244 KB Output is correct
29 Correct 436 ms 77724 KB Output is correct
30 Execution timed out 2095 ms 56220 KB Time limit exceeded
31 Halted 0 ms 0 KB -