#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long int ll;
typedef long double ld;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
typedef vector<vvvi> vvvvi;
typedef vector<bool> vb;
typedef vector<vb> vvb;
typedef vector<vvb> vvvb;
typedef vector<vvvb> vvvvb;
typedef pair<ll,ll> pi;
typedef pair<ll,pi> ppi;
typedef pair<ll,ppi> pppi;
typedef pair<ll,pppi> ppppi;
#define FOR(i,l,r) for(ll i=l;i<r;i++)
#define REP(i,n) FOR(i,0,n)
#define RFOR(i,l,r) for(ll i=r-1;i>=l;i--)
#define RREP(i,n) RFOR(i,0,n)
#define ALL(x) x.begin(),x.end()
#define F first
#define S second
#define BS(A,x) binary_search(ALL(A),x)
#define LB(A,x) (ll)(lower_bound(ALL(A),x)-A.begin())
#define UB(A,x) (ll)(upper_bound(ALL(A),x)-A.begin())
#define COU(A,x) (UB(A,x)-LB(A,x))
#define sz(c) ((ll)(c).size())
/*
#include<boost/multiprecision/cpp_int.hpp>
namespace mp=boost::multiprecision;
using Bint=mp::cpp_int;
*/
template<typename T>using min_priority_queue=priority_queue<T,vector<T>,greater<T>>;
template<typename T1,typename T2>ostream&operator<<(ostream&os,pair<T1,T2>&p){os<<p.F<<" "<<p.S;return os;}
template<typename T1,typename T2>istream&operator>>(istream&is,pair<T1,T2>&p){is>>p.F>>p.S;return is;}
template<typename T>ostream&operator<<(ostream&os,vector<T>&v){REP(i,sz(v))os<<v[i]<<(i+1!=sz(v)?" ":"");return os;}
template<typename T>istream&operator>>(istream&is,vector<T>&v){for(T&in:v)is>>in;return is;}
template<class T>bool chmax(T&a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T>bool chmin(T&a,T b){if(b<a){a=b;return 1;}return 0;}
ld dist(ld x1,ld y1,ld x2,ld y2){return sqrtl((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));}
vi fast_mod_convolution(vi&a,vi&b,ll mod){
  const ll m1=167772161,m2=469762049,m3=1224736769;
  const ll m1_inv_m2=inv_mod(m1,m2);
  const ll m12_inv_m3=inv_mod(m1*m2,m3);
  const ll m12_mod=m1*m2%mod;
  auto x=convolution<m1>(a,b);
  auto y=convolution<m2>(a,b);
  auto z=convolution<m3>(a,b);
  vector<ll>ret(sz(a)+sz(b)-1);
  REP(i,sz(ret)){
    ll v1=(y[i]-x[i])*m1_inv_m2%m2;if(v1<0)v1+=m2;
    ll v2=(z[i]-(x[i]+m1*v1)%m3)*m12_inv_m3%m3;if(v2<0)v2+=m3;
  	ret[i]=(x[i]+m1*v1+m12_mod*v2)%mod;
  }
  return ret;
}
const ld EPS=1e-8;
//*
using mint=modint998244353;
const ll mod=998244353;
//*/
/*
using mint=modint1000000007;
const ll mod=1000000007;
//*/
//using mint=modint;
//*
typedef vector<mint> vm;
typedef vector<vm> vvm;
typedef vector<vvm> vvvm;
typedef vector<vvvm> vvvvm;
ostream&operator<<(ostream&os,mint&a){os<<a.val();return os;}
//*/
int main(){
  ll N,K,C;cin>>N>>K>>C;
  vi u(K),v(K),w(K),p(K);
  REP(i,K){
  	cin>>u[i]>>v[i]>>w[i]>>p[i];
  	u[i]--;v[i]--;
  }
  vi idx(K);
  REP(i,K)idx[i]=i;
  sort(ALL(idx),[&](ll i,ll j){return w[i]<w[j];});
  dsu D(N);
  ll W=0,Pr=0;
  vector<vector<pi>>E(N);
  for(auto i:idx)if(!D.same(u[i],v[i])){
  	D.merge(u[i],v[i]);
  	W+=w[i];
  	chmax(Pr,p[i]);
  	E[u[i]].emplace_back(pi(v[i],w[i]));
  	E[v[i]].emplace_back(pi(u[i],w[i]));
  }
  if(W>C){cout<<-1<<endl;return 0;}
  vi P(N),dist(N,1e18);
  queue<ll>Q;
  Q.emplace(0);
  dist[0]=0;
  while(sz(Q)){
  	ll v=Q.front();Q.pop();
  	for(auto[u,w]:E[v])if(chmin(dist[u],dist[v]+w))P[u]=v,Q.emplace(u);
  }
  vvi T(20,vi(N)),U(20,vi(N));
  REP(i,N)T[0][i]=P[i],U[0][i]=dist[i]-dist[P[i]];
  FOR(i,1,20)REP(j,N)T[i][j]=T[i-1][T[i-1][j]],U[i][j]=max(U[i-1][j],U[i-1][T[i-1][j]]);
  auto up=[&](ll v,ll d){
  	chmin(d,N);
  	REP(i,20)if((d>>i)%2)v=T[i][v];
  	return v;
  };
  auto lca=[&](ll u,ll v){
  	if(dist[u]<dist[v])v=up(v,dist[v]-dist[u]);
  	if(dist[v]<dist[u])u=up(u,dist[u]-dist[v]);
  	ll l=-1,r=N;
  	while(r-l>1){
  		ll m=(l+r)/2;
  		if(up(u,m)==up(v,m))r=m;
  		else l=m;
  	}
  	return up(v,r);
  };
  auto ma=[&](ll u,ll v){
  	ll w=lca(u,v),ret=0;
  	ll du=dist[u]-dist[w],dv=dist[v]-dist[w];
  	REP(i,20)if((du>>i)%2)chmax(ret,U[i][u]),u=T[i][u];
  	REP(i,20)if((dv>>i)%2)chmax(ret,U[i][v]),v=T[i][v];
  	return ret;
  };
  ll ans=Pr;
  REP(i,K)if(ans<p[i]){
  	//w[i]<=C-W+(u[i]-v[i])間の辺の重みの最大値
  	if(w[i]<=C-W+ma(u[i],v[i]))ans=p[i];
  }
  cout<<ans<<endl;
  return 0;
}