Etäisyydet

input/code.cpp: In function 'int verify(std::vector<int>)':
input/code.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<tv.size()-1;i++)
                 ~^~~~~~~~~~~~
input/code.cpp: In function 'int depth(int, int, int)':
input/code.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

#include <bits/stdc++.h>
 
using namespace std;
 
#define N 101
 
int t,n;
vector<int> v[N];
int z[N];
 
void clearz()
{
    for(int i=0;i<N;i++)
    {
        z[i] = 0;
    }
}
 
void clearv()
{
    for(int i=0;i<N;i++)
    {
        v[i].resize(0);
    }
}
 
int depth(int n, int g, int cd)
{
    if(z[n]) return -1;
    z[n] = 1;
    for(auto u : v[n])
    {
        if(u == g) return cd;
        int dr = depth(u, g, cd+1);
        if(dr>0) return dr;
    }
}
 
int verify(vector<int> tv)
{
    for(int i=0;i<tv.size()-1;i++)
    {
        if(depth(tv[1], tv[i+1], 0)>3) return 0;
        clearz();
    }
    return 1;
}
 
int main()
{
    cin>>t;
    for(int o=0;o<t;o++)
    {
        cin>>n;
        vector<int> tv;
        int a,b;
        for(int i=1;i<n;i++)
        {
            cin>>a>>b;
            v[a].push_back(b);
            v[b].push_back(a);
            tv.push_back(i);
        }
        tv.push_back(n);
 
        do
        {
            if(verify(tv)) break;
        }while(next_permutation(tv.begin(), tv.end()));
 
        for(int i=0;i<n;i++)
        {
            cout<<tv[i]<<" ";
        }
        cout<<endl;
 
        clearv();
        clearz();
        n = 0;
    }
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: TIME LIMIT EXCEEDED