#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#define ll long long
#define arr array<int, 5>
#define pii pair<int, int>
vector<vector<arr>> graph;
vector<vector<int>> fc;
vector<int> d1;
vector<int> d2;
vector<int> d3;
vector<int> d4;
int lim = 1e9;
int32_t main()
{
//freopen("input.txt", "r", stdin);
//freopen("output.txt", "w", stdout);
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int n, m;
cin >> n >> m;
graph.assign(n, vector<arr>());
vector<map<int, int>> cost(n);
vector<map<int, int>> mn(n);
vector<map<int, vector<int>>> cc(n);
fc.assign(n, vector<int>());
d1.assign(n, lim);
d2.assign(n, lim);
d3.assign(n, lim);
d4.assign(n, lim);
for (int j = 0; j < m; j++)
{
int a, b, c, d;
cin >> a >> b >> c >> d;
a--; b--; c--;
graph[a].push_back({b, c, d, 0, 0});
graph[b].push_back({a, c, d, 0, 0});
}
for (int i = 0; i < n; i++)
{
for (arr ele:graph[i])
{
cost[i][ele[1]] += ele[2];
mn[i][ele[1]] = lim;
cc[i][ele[1]].push_back(ele[0]);
}
}
priority_queue<arr, vector<arr>, greater<arr>> pq;
pq.push({0, 0, 0, -1, 0});
pq.push({0, 1, 0, -1, 0});
pq.push({0, 2, 0, -1, 0});
pq.push({0, 3, 0, -1, 0});
while (pq.size())
{
arr a = pq.top();
pq.pop();
int d = a[0];
int c = a[1];
int i = a[2];
int p = a[3];
int pc = a[4];
if (pc == -1)
{
if (mn[i][c]<=d) continue;
mn[i][c]=d;
for (int ele:cc[i][c])
{
pq.push({d, c, ele, p, 0});
}
continue;
}
if (d4[i]<=d) continue;
int b = 0;
for (int ele:fc[i])
{
if (ele ==c) b=1;
}
if (b) continue;
fc[i].push_back(c);
if (d1[i]==lim) d1[i] = d;
else if (d2[i]==lim) d2[i] = d;
else if (d3[i]==lim) d3[i] = d;
else if (d4[i]==lim) d4[i] = d;
int ava1 = -1;
int ava2 = -1;
int avac1 = 0;
int avac2 = 0;
for (int j = 0; j < m; j++)
{
if (cost[i][j]==0)
{
if (ava1==-1) ava1 = j;
else if (ava2==-1)
{
ava2 = j;
break;
}
}
}
if (ava1==-1) avac1=lim;
if (ava2==-1) avac2=lim;
for (arr ele:graph[i])
{
if (cost[i][ele[1]]<avac1)
{
ava2 = ava1;
avac2 = avac1;
avac1=cost[i][ele[1]];
ava1=ele[1];
}
else if (cost[i][ele[1]]<avac2)
{
ava2 = ele[1];
avac2=cost[i][ele[1]];
}
}
for (arr ele:graph[i])
{
if (ele[0]==p) continue;
pq.push({d+cost[i][ele[1]]-ele[2], ele[1], ele[0], i, ele[1]});
pq.push({d+avac1, ele[1], ele[0], i, ele[1]});
pq.push({d+avac2, ele[1], ele[0], i, ele[1]});
pq.push({d+avac1+cost[ele[0]][ava1]-ele[2], ava1, ele[0], i, -1});
pq.push({d+avac2+cost[ele[0]][ava2]-ele[2], ava2, ele[0], i, -1});
}
}
if (d1[n-1]>=lim) cout << -1;
else cout << d1[n-1];
return 0;
}
