Distances

input/code.cpp: In function 'bool check(ll)':
input/code.cpp:33:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(auto i : res) cout<<i<<' ';cout<<'\n';
     ^~~
input/code.cpp:33:36: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
     for(auto i : res) cout<<i<<' ';cout<<'\n';
                                    ^~~~

// -- //
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll N = 120;
vector<ll> d[N];
bool dnu[N];
ll lval, lvert, n;
void dfs(ll v, ll p=-1, ll len=0){
    if(!dnu[v]&&len>lval) lval=len, lvert=v;
    if(len==3) return;
    for(auto i : d[v]){
        if(i!=p) dfs(i, v, len+1);
    }
}
bool check(ll v){
    vector<ll> res;
    res.push_back(v);
    dnu[v]=1;
    for(ll i = 1;i<n;i++){
        lval=0, lvert=v;
        dfs(v);
        ll e = lvert;
        res.push_back(e);
        if(dnu[e]){
            v=-1;
            break;
        }
        dnu[e]=1;
        v=e;
    }
    if(v==-1) return false;
    for(auto i : res) cout<<i<<' ';cout<<'\n';
    return true;
}
signed main(){
	cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(0);
    ll q;
    cin >> q;
    while(q--){
        cin >> n;
        for(ll i = 1;i<=n;i++) d[i].clear(), dnu[i]=0;
        for(ll a, b, i=1;i<n;i++){
            cin >> a >> b;
            d[a].push_back(b);
            d[b].push_back(a);
        }
        for(ll i = 1;i<=n;i++){
            if(check(i))break;
        }
    }
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER