oj.uz

Submission #432079

# Submission time Handle Problem Language Result Execution time Memory
432079 2021-06-17T20:18:01 Z rainboy Simurgh (IOI17_simurgh) C++
51 / 100
 135 ms 3348 KB 
#include "simurgh.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

using namespace std;

const int N = 240, M = N * (N - 1) / 2;

typedef vector<int> vi;

int ds[N], n;

int find(int i) {
	return ds[i] < 0 ? i : (ds[i] = find(ds[i]));
}

int join(int i, int j) {
	i = find(i);
	j = find(j);
	if (i == j)
		return 0;
	if (ds[i] > ds[j])
		ds[i] = j;
	else {
		if (ds[i] == ds[j])
			ds[i]--;
		ds[j] = i;
	}
	return 1;
}

int ii[M], jj[M];
int *eh[N], eo[N];

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

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

char cc[M], marked[M];

int dfs(int p, int i, int t) {
	int o;

	if (i == t)
		return 1;
	for (o = eo[i]; o--; ) {
		int h = eh[i][o], j = i ^ ii[h] ^ jj[h];

		if (j != p && dfs(i, j, t)) {
			marked[h] = 1;
			return 1;
		}
	}
	return 0;
}

vi hh, hh_;
int k_;

int count(int i, int m) {
	int g, m_, k;

	memset(ds, -1, n * sizeof *ds);
	m_ = 0;
	for (g = 0; g < m; g++) {
		int h = eh[i][g];

		join(ii[h], jj[h]);
		hh_[m_++] = h;
	}
	k = 0;
	for (g = 0; g < n - 1; g++)
		if (join(ii[hh[g]], jj[hh[g]]))
			hh_[m_++] = hh[g];
		else if (cc[hh[g]])
			k++;
	return count_common_roads(hh_) - k_ + k;
}

void solve(int i, int l, int r, int a, int b) {
	int m, c;

	if (a == b)
		return;
	if (r - l == 1) {
		cc[eh[i][l]] = 1;
		return;
	}
	m = (l + r) / 2;
	c = count(i, m);
	solve(i, l, m, a, c), solve(i, m, r, c, b);
}

vi find_roads(int n_, vi ii_, vi jj_) {
	int m = ii_.size(), m_, g, h, i;

	n = n_;
	for (h = 0; h < m; h++)
		ii[h] = ii_[h], jj[h] = jj_[h];
	hh.resize(n - 1), hh_.resize(n - 1);
	memset(ds, -1, n * sizeof *ds);
	for (i = 0; i < n; i++)
		eh[i] = (int *) malloc(2 * sizeof *eh[i]);
	m_ = 0;
	for (h = 0; h < m; h++)
		if (join(ii[h], jj[h])) {
			hh[m_++] = h, cc[h] = -1;
			append(ii[h], h), append(jj[h], h);
		} else
			cc[h] = -2;
	k_ = count_common_roads(hh);
	for (h = 0; h < m; h++) {
		int upd, c, tmp, k;

		if (cc[h] != -2)
			continue;
		for (g = 0; g < n - 1; g++)
			marked[hh[g]] = 0;
		dfs(-1, ii[h], jj[h]);
		upd = 0;
		for (g = 0; g < n - 1; g++)
			if (marked[hh[g]] && cc[hh[g]] == -1) {
				upd = 1;
				break;
			}
		if (!upd)
			continue;
		c = -1;
		for (g = 0; g < n - 1; g++)
			if (marked[hh[g]] && cc[hh[g]] != -1) {
				tmp = hh[g], hh[g] = h, k = count_common_roads(hh), hh[g] = tmp;
				c = cc[hh[g]] ^ (k == k_ ? 0 : 1);
				break;
			}
		for (g = 0; g < n - 1; g++)
			if (marked[hh[g]] && cc[hh[g]] == -1) {
				tmp = hh[g], hh[g] = h, k = count_common_roads(hh), hh[g] = tmp;
				if (k == k_ + 1)
					c = 1;
				else if (k == k_ - 1)
					c = 0;
				if (c != -1)
					cc[hh[g]] = c ^ (k == k_ ? 0 : 1);
			}
		if (c == -1)
			c = 0;
		for (g = 0; g < n - 1; g++)
			if (marked[hh[g]] && cc[hh[g]] == -1)
				cc[hh[g]] = c;
	}
	for (h = 0; h < m; h++)
		if (cc[h] == -1)
			cc[h] = 1;
		else if (cc[h] == -2)
			append(ii[h], h), append(jj[h], h);
	for (i = 0; i < n; i++) {
		int o, o_;

		for (o = 0, o_ = 0; o < eo[i]; o++) {
			h = eh[i][o];
			if (cc[h] == -2)
				cc[h] = 0, eh[i][o_++] = h;
		}
		eo[i] = o_;
		solve(i, 0, eo[i], 0, count(i, eo[i]));
	}
	m_ = 0;
	for (h = 0; h < m; h++)
		if (cc[h] == 1)
			hh[m_++] = h;
	return hh;
}

Compilation message

simurgh.cpp: In function 'void append(int, int)':
simurgh.cpp:39:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   39 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 204 KB correct
4 Correct 0 ms 204 KB correct
5 Correct 0 ms 204 KB correct
6 Correct 1 ms 204 KB correct
7 Correct 1 ms 204 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 1 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 0 ms 204 KB correct
13 Correct 1 ms 204 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 204 KB correct
4 Correct 0 ms 204 KB correct
5 Correct 0 ms 204 KB correct
6 Correct 1 ms 204 KB correct
7 Correct 1 ms 204 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 1 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 0 ms 204 KB correct
13 Correct 1 ms 204 KB correct
14 Correct 2 ms 332 KB correct
15 Correct 2 ms 332 KB correct
16 Correct 2 ms 332 KB correct
17 Correct 2 ms 332 KB correct
18 Correct 1 ms 204 KB correct
19 Correct 2 ms 332 KB correct
20 Correct 2 ms 332 KB correct
21 Correct 2 ms 332 KB correct
22 Correct 2 ms 204 KB correct
23 Correct 1 ms 204 KB correct
24 Correct 1 ms 204 KB correct
25 Correct 1 ms 204 KB correct
26 Correct 1 ms 204 KB correct
27 Correct 1 ms 204 KB correct
28 Correct 1 ms 204 KB correct
29 Correct 1 ms 204 KB correct
30 Correct 2 ms 204 KB correct
31 Correct 2 ms 204 KB correct
32 Correct 1 ms 332 KB correct
33 Correct 2 ms 204 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 204 KB correct
4 Correct 0 ms 204 KB correct
5 Correct 0 ms 204 KB correct
6 Correct 1 ms 204 KB correct
7 Correct 1 ms 204 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 1 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 0 ms 204 KB correct
13 Correct 1 ms 204 KB correct
14 Correct 2 ms 332 KB correct
15 Correct 2 ms 332 KB correct
16 Correct 2 ms 332 KB correct
17 Correct 2 ms 332 KB correct
18 Correct 1 ms 204 KB correct
19 Correct 2 ms 332 KB correct
20 Correct 2 ms 332 KB correct
21 Correct 2 ms 332 KB correct
22 Correct 2 ms 204 KB correct
23 Correct 1 ms 204 KB correct
24 Correct 1 ms 204 KB correct
25 Correct 1 ms 204 KB correct
26 Correct 1 ms 204 KB correct
27 Correct 1 ms 204 KB correct
28 Correct 1 ms 204 KB correct
29 Correct 1 ms 204 KB correct
30 Correct 2 ms 204 KB correct
31 Correct 2 ms 204 KB correct
32 Correct 1 ms 332 KB correct
33 Correct 2 ms 204 KB correct
34 Correct 133 ms 1236 KB correct
35 Correct 111 ms 1256 KB correct
36 Correct 82 ms 1004 KB correct
37 Correct 15 ms 332 KB correct
38 Correct 112 ms 1232 KB correct
39 Correct 112 ms 1184 KB correct
40 Correct 77 ms 1148 KB correct
41 Correct 130 ms 1232 KB correct
42 Correct 135 ms 1228 KB correct
43 Correct 49 ms 808 KB correct
44 Correct 39 ms 708 KB correct
45 Correct 44 ms 760 KB correct
46 Correct 36 ms 564 KB correct
47 Correct 18 ms 428 KB correct
48 Correct 5 ms 324 KB correct
49 Correct 8 ms 332 KB correct
50 Correct 18 ms 460 KB correct
51 Correct 46 ms 764 KB correct
52 Correct 47 ms 740 KB correct
53 Correct 34 ms 688 KB correct
54 Correct 50 ms 788 KB correct
55 Correct 55 ms 780 KB correct
56 Correct 48 ms 708 KB correct
57 Correct 62 ms 772 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 1 ms 204 KB correct
3 Runtime error 19 ms 3348 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 204 KB correct
4 Correct 0 ms 204 KB correct
5 Correct 0 ms 204 KB correct
6 Correct 1 ms 204 KB correct
7 Correct 1 ms 204 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 1 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 0 ms 204 KB correct
13 Correct 1 ms 204 KB correct
14 Correct 2 ms 332 KB correct
15 Correct 2 ms 332 KB correct
16 Correct 2 ms 332 KB correct
17 Correct 2 ms 332 KB correct
18 Correct 1 ms 204 KB correct
19 Correct 2 ms 332 KB correct
20 Correct 2 ms 332 KB correct
21 Correct 2 ms 332 KB correct
22 Correct 2 ms 204 KB correct
23 Correct 1 ms 204 KB correct
24 Correct 1 ms 204 KB correct
25 Correct 1 ms 204 KB correct
26 Correct 1 ms 204 KB correct
27 Correct 1 ms 204 KB correct
28 Correct 1 ms 204 KB correct
29 Correct 1 ms 204 KB correct
30 Correct 2 ms 204 KB correct
31 Correct 2 ms 204 KB correct
32 Correct 1 ms 332 KB correct
33 Correct 2 ms 204 KB correct
34 Correct 133 ms 1236 KB correct
35 Correct 111 ms 1256 KB correct
36 Correct 82 ms 1004 KB correct
37 Correct 15 ms 332 KB correct
38 Correct 112 ms 1232 KB correct
39 Correct 112 ms 1184 KB correct
40 Correct 77 ms 1148 KB correct
41 Correct 130 ms 1232 KB correct
42 Correct 135 ms 1228 KB correct
43 Correct 49 ms 808 KB correct
44 Correct 39 ms 708 KB correct
45 Correct 44 ms 760 KB correct
46 Correct 36 ms 564 KB correct
47 Correct 18 ms 428 KB correct
48 Correct 5 ms 324 KB correct
49 Correct 8 ms 332 KB correct
50 Correct 18 ms 460 KB correct
51 Correct 46 ms 764 KB correct
52 Correct 47 ms 740 KB correct
53 Correct 34 ms 688 KB correct
54 Correct 50 ms 788 KB correct
55 Correct 55 ms 780 KB correct
56 Correct 48 ms 708 KB correct
57 Correct 62 ms 772 KB correct
58 Correct 1 ms 204 KB correct
59 Correct 1 ms 204 KB correct
60 Runtime error 19 ms 3348 KB Execution killed with signal 11
61 Halted 0 ms 0 KB -