oj.uz

Submission #733652

# Submission time Handle Problem Language Result Execution time Memory
733652 2023-05-01T06:56:42 Z QwertyPi Jail (JOI22_jail) C++14
72 / 100
 5000 ms 832984 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
using namespace std;

const int N_MAX = 1.2e5 + 11; 
const int LG_N = 20;
vector<int> G[N_MAX], H[N_MAX];
vector<pair<int, int>> Q;
int anc[LG_N][N_MAX], p[N_MAX], d[N_MAX];
int st[N_MAX], ed[N_MAX];
bool vis[N_MAX];
bool in_stack[N_MAX];

int n, q;
void clear(){
	for(int i = 0; i <= n; i++) G[i].clear();
	for(int i = 0; i <= n; i++) H[i].clear();
	fill(st, st + n + 1, 0);
	fill(ed, ed + n + 1, 0);
	fill(vis, vis + n + 1, 0);
	fill(in_stack, in_stack + n + 1, 0);
	Q.clear();
}

void dfs(int v, int pa = -1){
	for(auto i : G[v]){
		if(i != pa){
			p[i] = anc[0][i] = v; d[i] = d[v] + 1; 
			for(int j = 1; j < LG_N; j++){
				anc[j][i] = anc[j - 1][anc[j - 1][i]];
			}
			dfs(i, v);
		}
	}
}

bool dfs2(int v){
	vis[v] = in_stack[v] = true;
	for(auto i : H[v]){
		if(in_stack[i]) return true;
		if(vis[i]) continue;
		bool fail = dfs2(i);
		if(fail) return true;
	}
	in_stack[v] = false;
	return false;
}

int kth_anc(int u, int k){
	for(int j = LG_N - 1; j >= 0; j--){
		if(k & (1 << j)) u = anc[j][u];
	}
	return u;
}

int lca(int u, int v){
	if(d[u] < d[v]) swap(u, v);
	u = kth_anc(u, d[u] - d[v]);
	for(int j = LG_N - 1; j >= 0; j--){
		if(anc[j][u] != anc[j][v]){
			u = anc[j][u], v = anc[j][v];
		}
	}
	return u == v ? u : p[u];
}

void solve(){
	cin >> n;
	for(int i = 0; i < n - 1; i++){
		int u, v; cin >> u >> v;
		G[u].push_back(v);
		G[v].push_back(u);
	}
	dfs(1);
	cin >> q;
	Q.push_back({-1, -1});
	for(int i = 1; i <= q; i++){
		int x, y; cin >> x >> y;
		Q.push_back({x, y});
		st[x] = i; ed[y] = i;
	}
	for(int i = 1; i <= q; i++){
		auto [x, y] = Q[i]; int l = lca(x, y);
		vector<int> P, p1, p2;
		while(x != l){
			p1.push_back(x); x = p[x];
		}
		while(y != l){
			p2.push_back(y); y = p[y];
		}
		for(auto i : p1) P.push_back(i);
		P.push_back(l);
		reverse(p2.begin(), p2.end());
		for(auto i : p2) P.push_back(i);
		for(auto p : P) {
			if(st[p] && st[p] != i){
				H[i].push_back(st[p]);
			}
			if(ed[p] && ed[p] != i){
				H[ed[p]].push_back(i);
			}
		}
	}
	bool fail = false;
	for(int i = 1; i <= q; i++){
		if(!vis[i]) fail |= dfs2(i);
		if(fail) break;
	}
	cout << (!fail ? "Yes" : "No") << endl;
}

int32_t main(){
	int q; cin >> q;
	while(q--){
		solve();
		clear();
	}
}

Compilation message

jail.cpp: In function 'void solve()':
jail.cpp:84:8: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   84 |   auto [x, y] = Q[i]; int l = lca(x, y);
      |        ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5972 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Correct 4 ms 5972 KB Output is correct
4 Correct 26 ms 6100 KB Output is correct
5 Correct 53 ms 6828 KB Output is correct
6 Correct 6 ms 6100 KB Output is correct
7 Correct 6 ms 6092 KB Output is correct
8 Correct 9 ms 6220 KB Output is correct
9 Correct 185 ms 10548 KB Output is correct
10 Correct 704 ms 33808 KB Output is correct
11 Correct 17 ms 6228 KB Output is correct
12 Correct 90 ms 7136 KB Output is correct
13 Correct 256 ms 62640 KB Output is correct
14 Correct 291 ms 77292 KB Output is correct
15 Execution timed out 5090 ms 832984 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5972 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Correct 6 ms 6056 KB Output is correct
4 Correct 5 ms 6100 KB Output is correct
5 Correct 6 ms 6092 KB Output is correct
6 Correct 6 ms 6200 KB Output is correct
7 Correct 6 ms 6100 KB Output is correct
8 Correct 7 ms 6100 KB Output is correct
9 Correct 5 ms 6100 KB Output is correct
10 Correct 6 ms 6088 KB Output is correct
11 Correct 6 ms 6100 KB Output is correct
12 Correct 5 ms 6104 KB Output is correct
13 Correct 5 ms 6088 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5972 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Correct 6 ms 6056 KB Output is correct
4 Correct 5 ms 6100 KB Output is correct
5 Correct 6 ms 6092 KB Output is correct
6 Correct 6 ms 6200 KB Output is correct
7 Correct 6 ms 6100 KB Output is correct
8 Correct 7 ms 6100 KB Output is correct
9 Correct 5 ms 6100 KB Output is correct
10 Correct 6 ms 6088 KB Output is correct
11 Correct 6 ms 6100 KB Output is correct
12 Correct 5 ms 6104 KB Output is correct
13 Correct 5 ms 6088 KB Output is correct
14 Correct 3 ms 5972 KB Output is correct
15 Correct 3 ms 5972 KB Output is correct
16 Correct 6 ms 6212 KB Output is correct
17 Correct 6 ms 6100 KB Output is correct
18 Correct 5 ms 6100 KB Output is correct
19 Correct 3 ms 5972 KB Output is correct
20 Correct 6 ms 6100 KB Output is correct
21 Correct 6 ms 6092 KB Output is correct
22 Correct 6 ms 6164 KB Output is correct
23 Correct 4 ms 5972 KB Output is correct
24 Correct 5 ms 5972 KB Output is correct
25 Correct 6 ms 6100 KB Output is correct
26 Correct 4 ms 6100 KB Output is correct
27 Correct 6 ms 6096 KB Output is correct
28 Correct 3 ms 5972 KB Output is correct

Subtask #4
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5972 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Correct 6 ms 6056 KB Output is correct
4 Correct 5 ms 6100 KB Output is correct
5 Correct 6 ms 6092 KB Output is correct
6 Correct 6 ms 6200 KB Output is correct
7 Correct 6 ms 6100 KB Output is correct
8 Correct 7 ms 6100 KB Output is correct
9 Correct 5 ms 6100 KB Output is correct
10 Correct 6 ms 6088 KB Output is correct
11 Correct 6 ms 6100 KB Output is correct
12 Correct 5 ms 6104 KB Output is correct
13 Correct 5 ms 6088 KB Output is correct
14 Correct 3 ms 5972 KB Output is correct
15 Correct 3 ms 5972 KB Output is correct
16 Correct 6 ms 6212 KB Output is correct
17 Correct 6 ms 6100 KB Output is correct
18 Correct 5 ms 6100 KB Output is correct
19 Correct 3 ms 5972 KB Output is correct
20 Correct 6 ms 6100 KB Output is correct
21 Correct 6 ms 6092 KB Output is correct
22 Correct 6 ms 6164 KB Output is correct
23 Correct 4 ms 5972 KB Output is correct
24 Correct 5 ms 5972 KB Output is correct
25 Correct 6 ms 6100 KB Output is correct
26 Correct 4 ms 6100 KB Output is correct
27 Correct 6 ms 6096 KB Output is correct
28 Correct 3 ms 5972 KB Output is correct
29 Correct 9 ms 6228 KB Output is correct
30 Correct 7 ms 6100 KB Output is correct
31 Correct 7 ms 6100 KB Output is correct
32 Correct 7 ms 6096 KB Output is correct
33 Correct 6 ms 6092 KB Output is correct
34 Correct 8 ms 6100 KB Output is correct
35 Correct 8 ms 6212 KB Output is correct
36 Correct 7 ms 6100 KB Output is correct
37 Correct 6 ms 6092 KB Output is correct

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5972 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Correct 6 ms 6056 KB Output is correct
4 Correct 5 ms 6100 KB Output is correct
5 Correct 6 ms 6092 KB Output is correct
6 Correct 6 ms 6200 KB Output is correct
7 Correct 6 ms 6100 KB Output is correct
8 Correct 7 ms 6100 KB Output is correct
9 Correct 5 ms 6100 KB Output is correct
10 Correct 6 ms 6088 KB Output is correct
11 Correct 6 ms 6100 KB Output is correct
12 Correct 5 ms 6104 KB Output is correct
13 Correct 5 ms 6088 KB Output is correct
14 Correct 3 ms 5972 KB Output is correct
15 Correct 3 ms 5972 KB Output is correct
16 Correct 6 ms 6212 KB Output is correct
17 Correct 6 ms 6100 KB Output is correct
18 Correct 5 ms 6100 KB Output is correct
19 Correct 3 ms 5972 KB Output is correct
20 Correct 6 ms 6100 KB Output is correct
21 Correct 6 ms 6092 KB Output is correct
22 Correct 6 ms 6164 KB Output is correct
23 Correct 4 ms 5972 KB Output is correct
24 Correct 5 ms 5972 KB Output is correct
25 Correct 6 ms 6100 KB Output is correct
26 Correct 4 ms 6100 KB Output is correct
27 Correct 6 ms 6096 KB Output is correct
28 Correct 3 ms 5972 KB Output is correct
29 Correct 9 ms 6228 KB Output is correct
30 Correct 7 ms 6100 KB Output is correct
31 Correct 7 ms 6100 KB Output is correct
32 Correct 7 ms 6096 KB Output is correct
33 Correct 6 ms 6092 KB Output is correct
34 Correct 8 ms 6100 KB Output is correct
35 Correct 8 ms 6212 KB Output is correct
36 Correct 7 ms 6100 KB Output is correct
37 Correct 6 ms 6092 KB Output is correct
38 Correct 186 ms 10572 KB Output is correct
39 Correct 680 ms 33644 KB Output is correct
40 Correct 122 ms 9420 KB Output is correct
41 Correct 84 ms 8168 KB Output is correct
42 Correct 110 ms 9484 KB Output is correct
43 Correct 63 ms 8140 KB Output is correct
44 Correct 23 ms 6612 KB Output is correct
45 Correct 123 ms 22648 KB Output is correct
46 Correct 118 ms 22664 KB Output is correct
47 Correct 188 ms 28008 KB Output is correct
48 Correct 176 ms 27876 KB Output is correct
49 Correct 108 ms 22800 KB Output is correct
50 Correct 105 ms 22872 KB Output is correct
51 Correct 97 ms 24192 KB Output is correct
52 Correct 104 ms 24164 KB Output is correct
53 Correct 26 ms 7364 KB Output is correct
54 Correct 146 ms 22520 KB Output is correct

Subtask #6
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5972 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Correct 3 ms 5972 KB Output is correct
4 Correct 3 ms 5972 KB Output is correct
5 Correct 17 ms 6076 KB Output is correct
6 Correct 5 ms 6208 KB Output is correct
7 Correct 4 ms 6096 KB Output is correct
8 Correct 3 ms 6076 KB Output is correct
9 Correct 3 ms 5972 KB Output is correct
10 Correct 4 ms 5972 KB Output is correct
11 Correct 4 ms 6168 KB Output is correct
12 Correct 6 ms 6100 KB Output is correct
13 Correct 47 ms 6600 KB Output is correct
14 Correct 71 ms 6848 KB Output is correct
15 Correct 66 ms 6736 KB Output is correct
16 Correct 153 ms 23208 KB Output is correct
17 Correct 333 ms 29180 KB Output is correct
18 Correct 705 ms 49256 KB Output is correct
19 Correct 175 ms 23288 KB Output is correct
20 Correct 186 ms 23392 KB Output is correct
21 Correct 177 ms 23372 KB Output is correct
22 Correct 253 ms 29792 KB Output is correct
23 Correct 264 ms 30272 KB Output is correct
24 Correct 250 ms 29976 KB Output is correct
25 Correct 292 ms 30132 KB Output is correct
26 Correct 275 ms 30348 KB Output is correct
27 Correct 439 ms 33412 KB Output is correct
28 Correct 473 ms 34896 KB Output is correct
29 Correct 455 ms 31984 KB Output is correct
30 Correct 298 ms 28144 KB Output is correct
31 Correct 307 ms 28692 KB Output is correct
32 Correct 296 ms 28040 KB Output is correct
33 Correct 302 ms 28640 KB Output is correct

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5972 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Correct 4 ms 5972 KB Output is correct
4 Correct 26 ms 6100 KB Output is correct
5 Correct 53 ms 6828 KB Output is correct
6 Correct 6 ms 6100 KB Output is correct
7 Correct 6 ms 6092 KB Output is correct
8 Correct 9 ms 6220 KB Output is correct
9 Correct 185 ms 10548 KB Output is correct
10 Correct 704 ms 33808 KB Output is correct
11 Correct 17 ms 6228 KB Output is correct
12 Correct 90 ms 7136 KB Output is correct
13 Correct 256 ms 62640 KB Output is correct
14 Correct 291 ms 77292 KB Output is correct
15 Execution timed out 5090 ms 832984 KB Time limit exceeded
16 Halted 0 ms 0 KB -