#include <bits/stdc++.h>
using namespace std;
//#include "swap.h"
//#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
vector <pi> adj[100005];
int par[100005];
pi mn[100005];
pi mn2[100005];
int mn3[100005];
int getr(int x){return (par[x] == x ? x : par[x] =getr(par[x]));}
void merge(int a, int b){a = getr(a); b = getr(b); if(a != b)par[b] = a;}
void init(int N, int M,
std::vector<int> U, std::vector<int> V, std::vector<int> W) {
vector <pii> bru;
for(int i=0;i<M;i++)bru.push_back({W[i], {U[i], V[i]}});
for(int i=0;i<N;i++)mn[i] = mn2[i] = {2e9, 0}, mn3[i] = 2e9;
sort(bru.begin(), bru.end());
for(int i=0;i<N;i++)par[i] = i;
for(auto i : bru){
int a = i.se.fi, b = i.se.se, w = i.fi;
if(mn[a].fi == 2e9)mn[a] = {w, b};
else if(mn2[a].fi == 2e9)mn2[a] = {w, b};
else if(mn3[a] == 2e9)mn3[a] = w;
if(mn[b].fi == 2e9)mn[b] = {w, a};
else if(mn2[b].fi == 2e9)mn2[b] = {w, a};
else if(mn3[b] == 2e9)mn3[b] = w;
if(getr(a) == getr(b))continue;
adj[a].push_back({b, w});
adj[b].push_back({a, w});
merge(a, b);
}
}
vector <int> path;
int tmp;
int tgt;
bool tr(int x, int par){
if(x == tgt){
path.push_back(x);
return 1;
}
bool res = 0;
for(auto [i, j] : adj[x]){
if(i == par)continue;
bool tt = tr(i, x);
res |= tt;
if(tt)tmp = max(tmp, j);
}
if(res)path.push_back(x);
return res;
}
int getMinimumFuelCapacity(int X, int Y) {
return -1;
}
