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#include <bits/stdc++.h>
using namespace std;
#define ll long long
 
#define pb push_back
#define fi first
#define se second
const ll MAXN = 30+7;
const ll INF = 1e18;
vector <vector<pair<ll,ll>>> a(MAXN);
vector <bool> ktra(MAXN,false);
vector <ll> vet(MAXN),best(MAXN);
ll tcp,u=0,ans=INF;
ll n,m,k;
 
void Try(ll xp){
    for(auto canh:a[xp]){
        ll v=canh.fi, w=canh.se;
        if(!ktra[v]){
            ktra[v]=true;
            u++; vet[u]=v; tcp+=w;
            Try(v);
            ktra[v]=false;
            u--;
            tcp-=w;
        }
        else{
            if(v==k && u+1==n){
                if(ans>tcp+w){
                    ans=tcp+w;
                    for(ll i=0 ; i<=u ; i++) best[i]=vet[i];
                    best[u+1]=k;
                }
            }
        }
    }
}
 
 
 
int main(){
    //freopen("inp.inp","r",stdin);
    cin >> n >> m >> k;
    for(ll i=1 ; i<=m ; i++){
        ll u,v,w; cin >> u >> v >> w;
        a[u].pb({v,w});
        a[v].pb({u,w});
    }
    ktra[k]=true;
    vet[u]=k;
    Try(k);
    if(ans==INF cout << "error!\n";
    else{
        cout << ans <<"\n";
            for(ll i=0; i<=n ; i++){
            cout << best[i] << " ";
        }
    }
}

prog.cpp: In function ‘int main()’:
prog.cpp:52:8: warning: init-statement in selection statements only available with -std=c++17 or -std=gnu++17
     if(ans==INF cout << "error!\n";
        ^~~
prog.cpp:52:16: error: expected ‘;’ before ‘cout’
     if(ans==INF cout << "error!\n";
                ^~~~~
                ;
prog.cpp:53:5: error: expected primary-expression before ‘else’
     else{
     ^~~~
prog.cpp:52:36: error: expected ‘)’ before ‘else’
     if(ans==INF cout << "error!\n";
       ~                            ^
                                    )
     else{
     ~~~~                            
prog.cpp:59:1: error: expected primary-expression before ‘}’ token
 }
 ^

Standard output is empty