#include <bits/stdc++.h>
#pragma GCC optimize("unroll-loops")
using namespace std;
using std::cout;
using std::cin;
using std::endl;
using ll=long long;
using ld=long double;
const ll ILL=2167167167167167167;
const int INF=2100000000;
const int mod=998244353;
#define rep(i,a,b) for (int i=(int)(a);i<(int)(b);i++)
#define all(p) p.begin(),p.end()
template<class T> using _pq = priority_queue<T, vector<T>, greater<T>>;
template<class T> ll LB(vector<T> &v,T a){return lower_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> ll UB(vector<T> &v,T a){return upper_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> bool chmin(T &a,T b){if(a>b){a=b;return 1;}else return 0;}
template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;}
template<class T> void So(vector<T> &v) {sort(v.begin(),v.end());}
template<class T> void Sore(vector<T> &v) {sort(v.begin(),v.end(),[](T x,T y){return x>y;});}
void yneos(bool a,bool upp=0){if(a) cout<<(upp?"YES\n":"Yes\n"); else cout<<(upp?"NO\n":"No\n");}
template<class T> void vec_out(vector<T> &p,int ty=0){
if(ty==2){cout<<'{';for(int i=0;i<(int)p.size();i++){if(i){cout<<",";}cout<<'"'<<p[i]<<'"';}cout<<"}\n";}
else{if(ty==1){cout<<p.size()<<"\n";}for(int i=0;i<(int)(p.size());i++){if(i) cout<<" ";cout<<p[i];}cout<<"\n";}}
template<class T> T vec_min(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmin(ans,x);return ans;}
template<class T> T vec_max(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmax(ans,x);return ans;}
template<class T> T vec_sum(vector<T> &a){T ans=T(0);for(auto &x:a) ans+=x;return ans;}
int pop_count(long long a){int res=0;while(a){res+=(a&1),a>>=1;}return res;}


namespace po167{
struct UFtree
{
	using _F=int;
	int _n;
	std::vector<_F> wei;
	std::vector<int> q;
	int component;
	UFtree(int n):_n(n),wei(n),component(n),par(n){
		for(int i=0;i<n;i++){
			wei[i]=1,par[i]=i;
		}
	}
	void intialize(){
		for(auto x:q){
			wei[root(x)]=1;
			par[x]=x;
		}
		component=(int)par.size();
		q={};
	}
	//根っこを返す
	int root(int a){
		assert(0<=a&&a<_n);
		if(a==par[a]) return a;
		return par[a]=root(par[a]);
	}
	//trueなら1,falseなら0
	int same(int a,int b){
		assert(0<=a&&a<_n);
		assert(0<=b&&b<_n);
		if(root(a)==root(b)) return 1;
		else return 0;
	}
	_F size(int a){
		return wei[root(a)];
	}
	//a,bが違う根っこの元なら結合する,結合したらtrueを返す
	bool unite(int a,int b){
		a=root(a),b=root(b);
		if(a==b) return false;
		if(wei[a]<wei[b]) std::swap(a,b);
		par[b]=a;
		q.push_back(b);
		wei[a]+=wei[b];
		component--;
		return true;
	}
	private:
	std::vector<int> par;
};
}
using po167::UFtree;


void solve();
// oddloop
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int t=1;
    //cin>>t;
    rep(i,0,t) solve();
}

void solve(){
    ll N,K,C;
    cin>>N>>K>>C;
    struct edge{
        ll a,b;
        ll w;
        ll p;
    };
    vector<edge> E(K);
    rep(i,0,K) cin>>E[i].a>>E[i].b>>E[i].w>>E[i].p,E[i].a--,E[i].b--;
    sort(all(E),[&](edge l,edge r){
        return l.w<r.w;
    });
    ll sum=0;
    ll ans=0;
    UFtree T(N);
    vector<int> use(K);
    rep(i,0,K){
        if(T.unite(E[i].a,E[i].b)){
            use[i]=1;
            sum+=E[i].w;
            chmax(ans,E[i].p);
        }
    }
    if(sum>C){
        cout<<"-1\n";
        return;
    }
    vector<set<int>> s(N);
    T.intialize();
    rep(i,0,K) if(use[i]==0) s[E[i].a].insert(i),s[E[i].b].insert(i);
    rep(i,0,K) if(use[i]==1){
        int a=T.root(E[i].a);
        int b=T.root(E[i].b);
        T.unite(a,b);
        if(T.root(a)==b) swap(a,b);
        if(s[a].size()<s[b].size()) swap(s[a],s[b]);
        for(auto x:s[b]){
            if(s[a].count(x)){
                ll tmp=sum-E[i].w+E[x].w;
                if(tmp<=C) chmax(ans,E[x].p);
                s[a].erase(x);
            }
            else s[a].insert(x);
        }
    }
    cout<<ans<<"\n";
}