#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001


int main(){
	
	int N,M,K;
	cin>>N>>M>>K;
	
	vector<int> u(M),v(M),c(M);
	rep(i,M){
		scanf("%d %d %d",&u[i],&v[i],&c[i]);
		u[i]--;v[i]--;
	}
	
	int ng = -1,ok = 200005;
	
	while(ok-ng>1){
		
		int mid = (ok+ng)/2;
		
		mcf_graph<int,int> G(N);
		rep(i,M){
			if(c[i]>mid){
				G.add_edge(u[i],v[i],1,1);
				G.add_edge(v[i],u[i],1,1);
			}
			else{
				G.add_edge(u[i],v[i],1,0);
				G.add_edge(v[i],u[i],1,0);
			}
		}
		
		if(G.flow(0,N-1,1).second<K)ok = mid;
		else ng = mid;
		
	}
	
	cout<<ok<<endl;
	
	return 0;
}