oj.uz

Submission #93009

# Submission time Handle Problem Language Result Execution time Memory
93009 2019-01-06T09:53:36 Z davitmarg Hard route (IZhO17_road) C++17
19 / 100
 2000 ms 53332 KB 
/*
DEATH-MATCH
Davit-Marg
*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <stack>
#include <iterator>
#include <ctype.h>
#include <stdlib.h>  
#include <cassert>
#include <fstream>  
#define mod 1000000007ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
using namespace std;

const int N = 5003;

int n,used[N][N],st;
vector<int> g[N],ord;
pair<LL, LL> dp[N];
LL  best;
map<LL, int> u;
void dfsinit(int v)
{
	used[st][v] = 1;
	for (int i = 0; i < g[v].size(); i++)
	{
		int to = g[v][i];
		if (used[st][to] == 1)
			continue;
		dfsinit(to);
		if (dp[to].first + 1 >= dp[v].first)
		{
			dp[v].second = dp[v].first;
			dp[v].first = dp[to].first + 1;
		}
		else if (dp[to].first + 1 >= dp[v].second)
			dp[v].second = dp[to].first + 1;
	}
}

void dfs(int v, LL d = 0, LL h = 0)
{
	used[st][v] = 2;
	if (g[v].size() == 1 && st!=v)
	{
		best = max(best, h*d);
		u[h*d]++;
	}
	for (int i = 0; i < g[v].size(); i++)
	{
		int to = g[v][i];
		if (used[st][to]==2)
			continue;
		LL H;
		if (dp[to].first + 1 == dp[v].first)
			H = max(h,dp[v].second);
		else
			H = max(h, dp[v].first);
		dfs(to,d+1,H);
	}
}

int main()
{
	cin >> n;
	for (int i = 0; i < n-1; i++)
	{
		int a, b;
		cin >> a >> b;
		g[a].PB(b);
		g[b].PB(a);
	}
	for (st = 1; st <= n; st++)
		if(g[st].size()==1)
		{
			memset(dp, 0 , N * sizeof(pair<LL, LL>));
			dfsinit(st);
			dfs(st);
		}
	cout << best<<" "<<u[best]/2 << endl;
	return 0;
}

/*


*/

Compilation message

road.cpp: In function 'void dfsinit(int)':
road.cpp:38:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < g[v].size(); i++)
                  ~~^~~~~~~~~~~~~
road.cpp: In function 'void dfs(int, long long int, long long int)':
road.cpp:62:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < g[v].size(); i++)
                  ~~^~~~~~~~~~~~~

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 632 KB Output is correct
8 Correct 2 ms 632 KB Output is correct
9 Correct 2 ms 632 KB Output is correct
10 Correct 3 ms 632 KB Output is correct
11 Correct 3 ms 760 KB Output is correct
12 Correct 3 ms 760 KB Output is correct
13 Correct 3 ms 760 KB Output is correct
14 Correct 3 ms 760 KB Output is correct
15 Correct 2 ms 632 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 3 ms 504 KB Output is correct
21 Correct 2 ms 504 KB Output is correct
22 Correct 2 ms 504 KB Output is correct
23 Correct 2 ms 632 KB Output is correct
24 Correct 3 ms 1016 KB Output is correct

Subtask #2
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 632 KB Output is correct
8 Correct 2 ms 632 KB Output is correct
9 Correct 2 ms 632 KB Output is correct
10 Correct 3 ms 632 KB Output is correct
11 Correct 3 ms 760 KB Output is correct
12 Correct 3 ms 760 KB Output is correct
13 Correct 3 ms 760 KB Output is correct
14 Correct 3 ms 760 KB Output is correct
15 Correct 2 ms 632 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 3 ms 504 KB Output is correct
21 Correct 2 ms 504 KB Output is correct
22 Correct 2 ms 504 KB Output is correct
23 Correct 2 ms 632 KB Output is correct
24 Correct 3 ms 1016 KB Output is correct
25 Correct 421 ms 29048 KB Output is correct
26 Correct 413 ms 29052 KB Output is correct
27 Correct 403 ms 29228 KB Output is correct
28 Correct 409 ms 29028 KB Output is correct
29 Execution timed out 2060 ms 53332 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #3
0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 632 KB Output is correct
8 Correct 2 ms 632 KB Output is correct
9 Correct 2 ms 632 KB Output is correct
10 Correct 3 ms 632 KB Output is correct
11 Correct 3 ms 760 KB Output is correct
12 Correct 3 ms 760 KB Output is correct
13 Correct 3 ms 760 KB Output is correct
14 Correct 3 ms 760 KB Output is correct
15 Correct 2 ms 632 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 3 ms 504 KB Output is correct
21 Correct 2 ms 504 KB Output is correct
22 Correct 2 ms 504 KB Output is correct
23 Correct 2 ms 632 KB Output is correct
24 Correct 3 ms 1016 KB Output is correct
25 Correct 421 ms 29048 KB Output is correct
26 Correct 413 ms 29052 KB Output is correct
27 Correct 403 ms 29228 KB Output is correct
28 Correct 409 ms 29028 KB Output is correct
29 Execution timed out 2060 ms 53332 KB Time limit exceeded
30 Halted 0 ms 0 KB -