oj.uz

답안 #994301

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
994301 2024-06-07T10:31:09 Z zsombor Jail (JOI22_jail) C++17
72 / 100
 4774 ms 1048576 KB 
#include <iostream>
#include <vector>
using namespace std;

int n, m, sz;
bool ans;
vector <vector <int>> g(2e5);
vector <int> dep(2e5, 0);
vector <vector <int>> lift(2e5, vector <int>(20, 0));
vector <int> v1(2e5, 0);
vector <int> v2(2e5, 0);
vector <int> kez(2e5, 0);
vector <int> veg(2e5, 0);
vector <vector <int>> g2(2e5);
vector <bool> be(2e5);
vector <bool> ki(2e5);

//vector <bool> del(2e5);

void reset() {
	ans = true;
	for (int i = 0; i <= n; i++) {
		g[i].clear();
		dep[i] = 0;
		fill(lift[i].begin(), lift[i].end(), 0);
		g2[i].clear();
		be[i] = ki[i] = false;
		kez[i] = veg[i] = -1;
	}
}

/*int get_c(int x) {
	if (del[x]) return 0;
	del[x] = true;
	int mx = 0, sum = 1;
	for (int i : g[x]) {

	}
	return sum;
}

void cd(int x) {
	sz = get_c(x);
	get_c(x);
}*/

void dfs(int x) {
	for (int i : g[x]) {
		if (i == lift[x][0]) continue;
		dep[i] = dep[x] + 1;
		lift[i][0] = x;
		dfs(i);
	}
}

int lca(int a, int b) {
	if (dep[a] < dep[b]) swap(a, b);
	for (int j = 19; j >= 0; j--) {
		if (dep[lift[a][j]] >= dep[b]) a = lift[a][j];
	}
	if (a == b) return a;
	for (int j = 19; j >= 0; j--) {
		if (lift[a][j] == lift[b][j]) continue;
		a = lift[a][j];
		b = lift[b][j];
	}
	return lift[a][0];
}

int par(int a, int k) {
	if (k < 0) return 0;
	for (int j = 0; j < 20; j++) {
		if (k & (1 << j)) a = lift[a][j];
	}
	return a;
}

bool on_path(int a, int b, int c) {
	int l = lca(a, b);
	if (dep[c] < dep[l]) return false;
	if (par(a, dep[a] - dep[c]) == c) return true;
	if (par(b, dep[b] - dep[c]) == c) return true;
	return false;
}

void get_path(int i, int a, int c) {
	while (true) {
		if (kez[a] > -1 && kez[a] != i) g2[kez[a]].push_back(i);
		if (veg[a] > -1 && veg[a] != i) g2[i].push_back(veg[a]);
		if (a == c) break;
		a = lift[a][0];
	}
}

void tp(int x) {
	if (be[x] && !ki[x]) ans = false;
	if (be[x]) return;
	be[x] = true;
	for (int i : g2[x]) tp(i);
	ki[x] = true;
}

void solve() {
	cin >> n;
	reset();
	int a, b;
	for (int i = 0; i < n - 1; i++) {
		cin >> a >> b;
		g[a].push_back(b);
		g[b].push_back(a);
	}
	dfs(1);
	for (int j = 1; j < 20; j++) {
		for (int i = 1; i <= n; i++) {
			lift[i][j] = lift[lift[i][j - 1]][j - 1];
		}
	}
	cin >> m;
	for (int i = 0; i < m; i++) {
		cin >> a >> b;
		v1[i] = a; v2[i] = b;
		kez[a] = i;
		veg[b] = i;
	}
	for (int i = 0; i < m; i++) {
		a = v1[i]; b = v2[i];
		int c = lca(a, b);
		get_path(i, a, c);
		get_path(i, b, c);
	}
	for (int i = 0; i < m; i++) tp(i);
	cout << (ans ? "Yes\n" : "No\n");
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int t;
	cin >> t;
	while (t--) solve();
}

/*

1
4
1 2
1 3
1 4
3
2 3
3 4
4 2

*/

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 37208 KB Output is correct
2 Correct 18 ms 37208 KB Output is correct
3 Correct 19 ms 37124 KB Output is correct
4 Correct 27 ms 37300 KB Output is correct
5 Correct 33 ms 37208 KB Output is correct
6 Correct 20 ms 37212 KB Output is correct
7 Correct 18 ms 37212 KB Output is correct
8 Correct 18 ms 37212 KB Output is correct
9 Correct 98 ms 39756 KB Output is correct
10 Correct 303 ms 50772 KB Output is correct
11 Correct 22 ms 37464 KB Output is correct
12 Correct 51 ms 37980 KB Output is correct
13 Correct 142 ms 79504 KB Output is correct
14 Correct 172 ms 93388 KB Output is correct
15 Runtime error 4774 ms 1048576 KB Execution killed with signal 9
16 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 37208 KB Output is correct
2 Correct 17 ms 37212 KB Output is correct
3 Correct 18 ms 37128 KB Output is correct
4 Correct 18 ms 37212 KB Output is correct
5 Correct 18 ms 37212 KB Output is correct
6 Correct 17 ms 37156 KB Output is correct
7 Correct 18 ms 37208 KB Output is correct
8 Correct 19 ms 37212 KB Output is correct
9 Correct 18 ms 37308 KB Output is correct
10 Correct 18 ms 37212 KB Output is correct
11 Correct 19 ms 37212 KB Output is correct
12 Correct 21 ms 37172 KB Output is correct
13 Correct 18 ms 37212 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 37208 KB Output is correct
2 Correct 17 ms 37212 KB Output is correct
3 Correct 18 ms 37128 KB Output is correct
4 Correct 18 ms 37212 KB Output is correct
5 Correct 18 ms 37212 KB Output is correct
6 Correct 17 ms 37156 KB Output is correct
7 Correct 18 ms 37208 KB Output is correct
8 Correct 19 ms 37212 KB Output is correct
9 Correct 18 ms 37308 KB Output is correct
10 Correct 18 ms 37212 KB Output is correct
11 Correct 19 ms 37212 KB Output is correct
12 Correct 21 ms 37172 KB Output is correct
13 Correct 18 ms 37212 KB Output is correct
14 Correct 18 ms 37128 KB Output is correct
15 Correct 18 ms 37212 KB Output is correct
16 Correct 18 ms 37252 KB Output is correct
17 Correct 19 ms 37212 KB Output is correct
18 Correct 18 ms 37212 KB Output is correct
19 Correct 17 ms 37108 KB Output is correct
20 Correct 19 ms 37216 KB Output is correct
21 Correct 19 ms 37212 KB Output is correct
22 Correct 18 ms 37212 KB Output is correct
23 Correct 19 ms 37212 KB Output is correct
24 Correct 18 ms 37100 KB Output is correct
25 Correct 19 ms 37212 KB Output is correct
26 Correct 21 ms 37128 KB Output is correct
27 Correct 18 ms 37208 KB Output is correct
28 Correct 18 ms 37212 KB Output is correct

Subtask #4
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 37208 KB Output is correct
2 Correct 17 ms 37212 KB Output is correct
3 Correct 18 ms 37128 KB Output is correct
4 Correct 18 ms 37212 KB Output is correct
5 Correct 18 ms 37212 KB Output is correct
6 Correct 17 ms 37156 KB Output is correct
7 Correct 18 ms 37208 KB Output is correct
8 Correct 19 ms 37212 KB Output is correct
9 Correct 18 ms 37308 KB Output is correct
10 Correct 18 ms 37212 KB Output is correct
11 Correct 19 ms 37212 KB Output is correct
12 Correct 21 ms 37172 KB Output is correct
13 Correct 18 ms 37212 KB Output is correct
14 Correct 18 ms 37128 KB Output is correct
15 Correct 18 ms 37212 KB Output is correct
16 Correct 18 ms 37252 KB Output is correct
17 Correct 19 ms 37212 KB Output is correct
18 Correct 18 ms 37212 KB Output is correct
19 Correct 17 ms 37108 KB Output is correct
20 Correct 19 ms 37216 KB Output is correct
21 Correct 19 ms 37212 KB Output is correct
22 Correct 18 ms 37212 KB Output is correct
23 Correct 19 ms 37212 KB Output is correct
24 Correct 18 ms 37100 KB Output is correct
25 Correct 19 ms 37212 KB Output is correct
26 Correct 21 ms 37128 KB Output is correct
27 Correct 18 ms 37208 KB Output is correct
28 Correct 18 ms 37212 KB Output is correct
29 Correct 21 ms 37208 KB Output is correct
30 Correct 18 ms 37212 KB Output is correct
31 Correct 22 ms 37292 KB Output is correct
32 Correct 19 ms 37212 KB Output is correct
33 Correct 18 ms 37312 KB Output is correct
34 Correct 19 ms 37212 KB Output is correct
35 Correct 25 ms 37212 KB Output is correct
36 Correct 18 ms 37208 KB Output is correct
37 Correct 18 ms 37176 KB Output is correct

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 37208 KB Output is correct
2 Correct 17 ms 37212 KB Output is correct
3 Correct 18 ms 37128 KB Output is correct
4 Correct 18 ms 37212 KB Output is correct
5 Correct 18 ms 37212 KB Output is correct
6 Correct 17 ms 37156 KB Output is correct
7 Correct 18 ms 37208 KB Output is correct
8 Correct 19 ms 37212 KB Output is correct
9 Correct 18 ms 37308 KB Output is correct
10 Correct 18 ms 37212 KB Output is correct
11 Correct 19 ms 37212 KB Output is correct
12 Correct 21 ms 37172 KB Output is correct
13 Correct 18 ms 37212 KB Output is correct
14 Correct 18 ms 37128 KB Output is correct
15 Correct 18 ms 37212 KB Output is correct
16 Correct 18 ms 37252 KB Output is correct
17 Correct 19 ms 37212 KB Output is correct
18 Correct 18 ms 37212 KB Output is correct
19 Correct 17 ms 37108 KB Output is correct
20 Correct 19 ms 37216 KB Output is correct
21 Correct 19 ms 37212 KB Output is correct
22 Correct 18 ms 37212 KB Output is correct
23 Correct 19 ms 37212 KB Output is correct
24 Correct 18 ms 37100 KB Output is correct
25 Correct 19 ms 37212 KB Output is correct
26 Correct 21 ms 37128 KB Output is correct
27 Correct 18 ms 37208 KB Output is correct
28 Correct 18 ms 37212 KB Output is correct
29 Correct 21 ms 37208 KB Output is correct
30 Correct 18 ms 37212 KB Output is correct
31 Correct 22 ms 37292 KB Output is correct
32 Correct 19 ms 37212 KB Output is correct
33 Correct 18 ms 37312 KB Output is correct
34 Correct 19 ms 37212 KB Output is correct
35 Correct 25 ms 37212 KB Output is correct
36 Correct 18 ms 37208 KB Output is correct
37 Correct 18 ms 37176 KB Output is correct
38 Correct 99 ms 39760 KB Output is correct
39 Correct 303 ms 50768 KB Output is correct
40 Correct 82 ms 39504 KB Output is correct
41 Correct 46 ms 38228 KB Output is correct
42 Correct 60 ms 39760 KB Output is correct
43 Correct 38 ms 38484 KB Output is correct
44 Correct 26 ms 37464 KB Output is correct
45 Correct 59 ms 42064 KB Output is correct
46 Correct 59 ms 42064 KB Output is correct
47 Correct 120 ms 45652 KB Output is correct
48 Correct 121 ms 45652 KB Output is correct
49 Correct 71 ms 42068 KB Output is correct
50 Correct 74 ms 42152 KB Output is correct
51 Correct 49 ms 43360 KB Output is correct
52 Correct 48 ms 43320 KB Output is correct
53 Correct 27 ms 37724 KB Output is correct
54 Correct 74 ms 41896 KB Output is correct

Subtask #6
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 37208 KB Output is correct
2 Correct 18 ms 37208 KB Output is correct
3 Correct 19 ms 37212 KB Output is correct
4 Correct 18 ms 37208 KB Output is correct
5 Correct 22 ms 37212 KB Output is correct
6 Correct 18 ms 37224 KB Output is correct
7 Correct 18 ms 37212 KB Output is correct
8 Correct 18 ms 37212 KB Output is correct
9 Correct 18 ms 37248 KB Output is correct
10 Correct 21 ms 37132 KB Output is correct
11 Correct 18 ms 37208 KB Output is correct
12 Correct 19 ms 37212 KB Output is correct
13 Correct 33 ms 37212 KB Output is correct
14 Correct 40 ms 37140 KB Output is correct
15 Correct 36 ms 37212 KB Output is correct
16 Correct 67 ms 41528 KB Output is correct
17 Correct 142 ms 47696 KB Output is correct
18 Correct 282 ms 71480 KB Output is correct
19 Correct 73 ms 41296 KB Output is correct
20 Correct 72 ms 41300 KB Output is correct
21 Correct 70 ms 41244 KB Output is correct
22 Correct 115 ms 47488 KB Output is correct
23 Correct 103 ms 47736 KB Output is correct
24 Correct 105 ms 47220 KB Output is correct
25 Correct 124 ms 47308 KB Output is correct
26 Correct 97 ms 47204 KB Output is correct
27 Correct 143 ms 46656 KB Output is correct
28 Correct 144 ms 50892 KB Output is correct
29 Correct 140 ms 47816 KB Output is correct
30 Correct 88 ms 45396 KB Output is correct
31 Correct 107 ms 45772 KB Output is correct
32 Correct 98 ms 44496 KB Output is correct
33 Correct 118 ms 45980 KB Output is correct

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 37208 KB Output is correct
2 Correct 18 ms 37208 KB Output is correct
3 Correct 19 ms 37124 KB Output is correct
4 Correct 27 ms 37300 KB Output is correct
5 Correct 33 ms 37208 KB Output is correct
6 Correct 20 ms 37212 KB Output is correct
7 Correct 18 ms 37212 KB Output is correct
8 Correct 18 ms 37212 KB Output is correct
9 Correct 98 ms 39756 KB Output is correct
10 Correct 303 ms 50772 KB Output is correct
11 Correct 22 ms 37464 KB Output is correct
12 Correct 51 ms 37980 KB Output is correct
13 Correct 142 ms 79504 KB Output is correct
14 Correct 172 ms 93388 KB Output is correct
15 Runtime error 4774 ms 1048576 KB Execution killed with signal 9
16 Halted 0 ms 0 KB -