2020/5/18-2020/5/24

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<set>
#include<queue>
#include<vector>
#include<cmath>
#include<cstdlib>
#include<map>
#include<stack>
using namespace std;
typedef long long ll;
const int N=50005;
const int M=200005;
ll getin(){
    char c;bool flag=0;ll num=0ll;
    while((c=getchar())<'0'||c>'9')if(c=='-')flag=1;
    while(c>='0'&&c<='9'){num=num*10+c-48;c=getchar();}
    if(flag) num=-num;
	return num;
}
int n,m,cnt=1,fir[N],tar[M],nxt[M];
ll w[M],f[N],a[65];bool dfn[N];
inline void link(int a,int b,ll c){
	tar[++cnt]=b,w[cnt]=c;
	nxt[cnt]=fir[a],fir[a]=cnt;
}
inline void insert(ll x){
	for(int i=61;i>=0;i--)if(x&(1ll<<i)){
		if(a[i]) x^=a[i];
		else{a[i]=x;break ;}
	}
}
void dfs(int x,int last){
	dfn[x]=1;
	for(int i=fir[x];i;i=nxt[i]){
		if(i==(last^1)) continue ;
		if(!dfn[tar[i]]){
			f[tar[i]]=f[x]^w[i];
			dfs(tar[i],i);
		}
		else insert(f[x]^f[tar[i]]^w[i]);
	}
}
int main(){
	n=getin(),m=getin();
	while(m--){
		int x=getin(),y=getin();
		ll w=getin();
		link(x,y,w),link(y,x,w);
	}
	dfs(1,0);
	ll ans=f[n];
	for(int i=61;i>=0;i--)
		ans=max(ans,ans^a[i]);
	cout<<ans<<endl;
}