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Submission #382166

# Submission time Handle Problem Language Result Execution time Memory
382166 2021-03-26T15:46:38 Z MohamedAhmed04 Cheap flights (LMIO18_pigus_skrydziai) C++14
0 / 100
 114 ms 24940 KB 
#include <bits/stdc++.h>

using namespace std ;

const int MAX = 5e5 + 10 ;

int vis[MAX] , mark[MAX] , dep[MAX] ;
int n , m ;

vector< vector< pair<int , int> > >adj(MAX) ;

long long ans = 0ll ;

void dfs(int node , long long x , long long y)
{
	vis[node] = mark[node] = 1 ;
	long long sum = 0 ;
	for(auto &child : adj[node])
	{
		ans = max(ans , y + child.second) ;
		int to = child.first ;
		sum += child.second ;
		if(vis[to])
		{
			if(mark[to] && dep[to] == dep[node] - 2)
				ans = max(ans , x + y + child.second) ;
			continue ;
		}
		dep[to] = dep[node] + 1 ;
		dfs(to , y , child.second) ;
	}
	ans = max(ans , sum) ;
	mark[node] = 0 ;
}

int main()
{
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	cin>>n>>m ;
	for(int i = 0 ; i < m ; ++i)
	{
		int x , y , z ;
		cin>>x>>y>>z ;
		adj[x].emplace_back(y , z) ;
		adj[y].emplace_back(x , z) ;
	}
	for(int i = 1 ; i <= n ; ++i)
	{
		if(!vis[i])
			dfs(i , 0 , 0) ;
	}
	return cout<<ans<<"\n" , 0 ;
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 12140 KB Output is correct
2 Correct 9 ms 12140 KB Output is correct
3 Incorrect 8 ms 12140 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 12140 KB Output is correct
2 Correct 9 ms 12140 KB Output is correct
3 Incorrect 8 ms 12140 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 114 ms 24940 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Incorrect 114 ms 24940 KB Output isn't correct
2 Halted 0 ms 0 KB -