Submission #907388

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
907388	2024-01-15T13:18:28 Z	daoquanglinh2007	Hard route (IZhO17_road)	C++17	52 / 100	278 ms	1116 KB

road

#include <bits/stdc++.h>
using namespace std;

const int NM = 5000;

int N, deg[NM+5], f[NM+5], g[NM+5], dep[NM+5];
vector <int> adj[NM+5];
int ans = -1, cnt = -1;

void dfs(int u, int p){
	dep[u] = (p == -1 ? 0 : dep[p]+1);
	f[u] = g[u] = 0;
	for (int v : adj[u]){
		if (v == p) continue;
		dfs(v, u);
		if (f[v]+1 > f[u]){
			g[u] = f[u];
			f[u] = f[v]+1;
		}
		else if (f[v]+1 > g[u]){
			g[u] = f[v]+1;
		}
	}
}

void calc(int u, int p, int cur){
	bool has_child = 0;
	for (int v : adj[u]){
		if (v == p) continue;
		has_child = 1;
		if (f[v]+1 == f[u]) calc(v, u, max(cur, g[u]));
		else calc(v, u, max(cur, f[u]));
	}
	if (!has_child){
		if (dep[u]*cur > ans){
			ans = dep[u]*cur;
			cnt = 1;
		}
		else if (dep[u]*cur == ans) cnt++;
	}
}

void solve(int r){
	dfs(r, -1);
	calc(r, -1, 0);
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	cin >> N;
	for (int i = 1; i < N; i++){
		int u, v; cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
		deg[u]++; deg[v]++;
	}
	for (int i = 1; i <= N; i++)
		if (deg[i] == 1) solve(i);
	cout << ans << ' ' << cnt/2;
	return 0;
}

Subtask #1
19.0 / 19.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 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	348 KB	Output is correct
6	Correct	1 ms	580 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	504 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 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	604 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	1 ms	348 KB	Output is correct
23	Correct	1 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct

Subtask #2
33.0 / 33.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 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	348 KB	Output is correct
6	Correct	1 ms	580 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	504 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 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	604 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	1 ms	348 KB	Output is correct
23	Correct	1 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	144 ms	860 KB	Output is correct
26	Correct	146 ms	1044 KB	Output is correct
27	Correct	160 ms	1112 KB	Output is correct
28	Correct	172 ms	860 KB	Output is correct
29	Correct	208 ms	860 KB	Output is correct
30	Correct	220 ms	1108 KB	Output is correct
31	Correct	196 ms	860 KB	Output is correct
32	Correct	226 ms	860 KB	Output is correct
33	Correct	3 ms	1116 KB	Output is correct
34	Correct	3 ms	1116 KB	Output is correct
35	Correct	3 ms	1116 KB	Output is correct
36	Correct	3 ms	952 KB	Output is correct
37	Correct	2 ms	1116 KB	Output is correct
38	Correct	2 ms	1116 KB	Output is correct
39	Correct	3 ms	860 KB	Output is correct
40	Correct	4 ms	940 KB	Output is correct
41	Correct	5 ms	860 KB	Output is correct
42	Correct	11 ms	1112 KB	Output is correct
43	Correct	19 ms	860 KB	Output is correct
44	Correct	43 ms	860 KB	Output is correct
45	Correct	77 ms	604 KB	Output is correct
46	Correct	88 ms	604 KB	Output is correct
47	Correct	218 ms	860 KB	Output is correct
48	Correct	278 ms	868 KB	Output is correct

Subtask #3
0 / 48.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 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	348 KB	Output is correct
6	Correct	1 ms	580 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	504 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 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	604 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	1 ms	348 KB	Output is correct
23	Correct	1 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	144 ms	860 KB	Output is correct
26	Correct	146 ms	1044 KB	Output is correct
27	Correct	160 ms	1112 KB	Output is correct
28	Correct	172 ms	860 KB	Output is correct
29	Correct	208 ms	860 KB	Output is correct
30	Correct	220 ms	1108 KB	Output is correct
31	Correct	196 ms	860 KB	Output is correct
32	Correct	226 ms	860 KB	Output is correct
33	Correct	3 ms	1116 KB	Output is correct
34	Correct	3 ms	1116 KB	Output is correct
35	Correct	3 ms	1116 KB	Output is correct
36	Correct	3 ms	952 KB	Output is correct
37	Correct	2 ms	1116 KB	Output is correct
38	Correct	2 ms	1116 KB	Output is correct
39	Correct	3 ms	860 KB	Output is correct
40	Correct	4 ms	940 KB	Output is correct
41	Correct	5 ms	860 KB	Output is correct
42	Correct	11 ms	1112 KB	Output is correct
43	Correct	19 ms	860 KB	Output is correct
44	Correct	43 ms	860 KB	Output is correct
45	Correct	77 ms	604 KB	Output is correct
46	Correct	88 ms	604 KB	Output is correct
47	Correct	218 ms	860 KB	Output is correct
48	Correct	278 ms	868 KB	Output is correct
49	Runtime error	1 ms	860 KB	Execution killed with signal 11
50	Halted	0 ms	0 KB	-

Submission #907388

Compilation message

Subtask #1 19.0 / 19.0

Subtask #2 33.0 / 33.0

Subtask #3 0 / 48.0

Subtask #1
19.0 / 19.0

Subtask #2
33.0 / 33.0

Subtask #3
0 / 48.0