#ifndef CPL_TEMPLATE
#define CPL_TEMPLATE
/*
Normie's Template v2.5
Changes:
Added warning against using pragmas on USACO.
*/
// Standard library in one include.
#include <bits/stdc++.h>
using namespace std;
// ordered_set library.
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set(el) tree<el,null_type,less<el>,rb_tree_tag,tree_order_statistics_node_update>
// AtCoder library. (Comment out these two lines if you're not submitting in AtCoder.) (Or if you want to use it in other judges, run expander.py first.)
//#include <atcoder/all>
//using namespace atcoder;
//Pragmas (Comment out these three lines if you're submitting in szkopul or USACO.)
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast,unroll-loops,tree-vectorize")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
//File I/O.
#define FILE_IN "cseq.inp"
#define FILE_OUT "cseq.out"
#define ofile freopen(FILE_IN,"r",stdin);freopen(FILE_OUT,"w",stdout)
//Fast I/O.
#define fio ios::sync_with_stdio(0);cin.tie(0)
#define nfio cin.tie(0)
#define endl "\n"
//Order checking.
#define ord(a,b,c) ((a>=b)and(b>=c))
//min/max redefines, so i dont have to resolve annoying compile errors.
#define min(a,b) (((a)<(b))?(a):(b))
#define max(a,b) (((a)>(b))?(a):(b))
// Fast min/max assigns to use with AVX.
// Requires g++ 9.2.0.
template<typename T>
__attribute__((always_inline)) void chkmin(T& a, const T& b) {
a=(a<b)?a:b;
}
template<typename T>
__attribute__((always_inline)) void chkmax(T& a, const T& b) {
a=(a>b)?a:b;
}
//Constants.
#define MOD (ll(998244353))
#define MAX 300001
#define mag 320
const long double PI=3.14159265358979;
//Pairs and 3-pairs.
#define p1 first
#define p2 second.first
#define p3 second.second
#define fi first
#define se second
#define pii(element_type) pair<element_type,element_type>
#define piii(element_type) pair<element_type,pii(element_type)>
//Quick power of 2.
#define pow2(x) (ll(1)<<x)
//Short for-loops.
#define ff(i,__,___) for(int i=__;i<=___;i++)
#define rr(i,__,___) for(int i=__;i>=___;i--)
//Typedefs.
#define bi BigInt
typedef long long ll;
typedef long double ld;
typedef short sh;
// Binpow and stuff
ll BOW(ll a, ll x, ll p)
{
if (!x) return 1;
ll res=BOW(a,x/2,p);
res*=res;
res%=p;
if (x%2) res*=a;
return res%p;
}
ll INV(ll a, ll p)
{
return BOW(a,p-2,p);
}
//---------END-------//
#endif
vector<pii(ll)> gt[500001];
ll n,m,i,j,k,t,t1,u,v,a,b;
ll ar[200001],br[200001],cr[200001],pr[200001];
map<ll,ll> summ[100001];
map<ll,ll> maxx[100001];
map<ll,vector<ll>> lmao[100001];
ll dis[500001];
priority_queue<pii(ll),vector<pii(ll)>,greater<pii(ll)>> pq;
int main()
{
fio;
cin>>n>>m;
for (i=1;i<=m;i++)
{
cin>>ar[i]>>br[i]>>cr[i]>>pr[i];
lmao[ar[i]][cr[i]].push_back(br[i]);
lmao[br[i]][cr[i]].push_back(ar[i]);
summ[ar[i]][cr[i]]+=pr[i];
summ[br[i]][cr[i]]+=pr[i];
if (maxx[ar[i]][cr[i]]<pr[i]) maxx[ar[i]][cr[i]]=pr[i];
if (maxx[br[i]][cr[i]]<pr[i]) maxx[br[i]][cr[i]]=pr[i];
}
for (i=1;i<=n;i++)
{
for (auto g : lmao[i])
if (g.se.size()==1)
{
gt[i].push_back({g.se[0],0});
}
else
{
t++;
u=summ[i][g.fi]-maxx[i][g.fi];
for (auto gg : g.se)
gt[gg].push_back({n+m+t,u});
for (auto gg : g.se)
gt[n+m+t].push_back({gg,u});
}
}
for (i=1;i<=m;i++)
{
gt[ar[i]].push_back({n+i,pr[i]});
gt[br[i]].push_back({n+i,pr[i]});
gt[n+i].push_back({ar[i],0});
gt[n+i].push_back({br[i],0});
if (lmao[ar[i]][cr[i]].size()==2)
{
if (lmao[ar[i]][cr[i]][0]!=br[i])
{
gt[n+i].push_back({lmao[ar[i]][cr[i]][0],0});
}
else
{
gt[n+i].push_back({lmao[ar[i]][cr[i]][1],0});
}
}
if (lmao[br[i]][cr[i]].size()==2)
{
if (lmao[br[i]][cr[i]][0]!=ar[i])
{
gt[n+i].push_back({lmao[br[i]][cr[i]][0],0});
}
else
{
gt[n+i].push_back({lmao[br[i]][cr[i]][1],0});
}
}
}
for (i=1;i<=n+m;i++) dis[i]=1e18;
dis[1]=0;
pq.push({0,1});
while(pq.size())
{
auto pp=pq.top();
pq.pop();
if (dis[pp.se]-pp.fi) continue;
for (auto g : gt[pp.se])
{
if (dis[g.fi]>pp.fi+g.se)
{
dis[g.fi]=pp.fi+g.se;
pq.push({pp.fi+g.se,g.fi});
}
}
}
if (dis[n]==1e18) cout<<-1; else cout<<dis[n];
}
// a
