Submission #831518

#	Time	Username	Problem	Language	Result	Execution time	Memory
831518		Trumling	Stations (IOI20_stations)	C++17	0 / 100	124 ms	53344 KiB

stations

    #include "stations.h"
    #include <vector>
    #include<bits/stdc++.h>
    using namespace std;
     
    #define F first
    #define S second
    #define all(x) x.begin(),x.end()
    typedef long long ll;
    #define pb push_back
    #define INF 99999999999

	ll nn;
    vector<vector<int>>g;
	vector<vector<vector<int> > >dic;
    ll here=0;
	vector<int>labels;

	void dfs(int beg,int sec,int start,int pre)
	{
		//assert(beg<nn);

		dic[beg][sec].pb(start);
		for(auto x:g[start])
			if(pre!=x)
				dfs(beg,sec,x,start);
		
	}

    vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    nn=n;
		dic.assign(n+1,vector<vector<int>>(n+1,vector<int>()));
    	g.assign(n+1,vector<int>());
    	labels.assign(n,0);
		vector<bool>cnt(n,0);

    	for (int i = 0; i < n-1; i++) {
    		g[u[i]].pb(v[i]);
    		g[v[i]].pb(u[i]);
		}

	for(int i=0;i<n;i++)
	{
		labels[i]=i;
		for(auto x:g[i])
			dfs(i,x,x,i);
	}
		

    	return labels;
    }
     
    int find_next_station(int s, int t, vector<int> c) 
    {
		for(auto x:c)
		{
			assert(s<nn && x<nn);
			for(auto y:dic[s][x])
				if(y==t)
				return x;

		}
			
		
    }
/*
1
6 10000
0 1 
1 2 
2 3
1 4 
4 5
*/

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:65:5: warning: control reaches end of non-void function [-Wreturn-type]
   65 |     }
      |     ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61