#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define sz(x) (int)(x.size())
#define all(x) x.begin(),x.end()
#define F first
#define S second
#define pb push_back
#ifdef local
void setio(){freopen("/Users/iantsai/Library/Mobile Documents/com~apple~CloudDocs/cpp/Empty.md","r",stdin);}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
struct edge{
int a,b,c,d;
};
const int mxn=405;
vector<edge>e;
vector<pii>adj[mxn];
vector<int>temp;
vector<int> dij(int st,int ed){
vector<int>dis(mxn);
for(int i=0;i<mxn;i++)dis[i]=1e9;
dis[st]=0;
priority_queue<pii,vector<pii>,greater<pii>>pq;
pq.push({0,st});
while(sz(pq)){
auto [d,v]=pq.top();
pq.pop();
if(dis[v]<d)continue;
//cout<<v<<' ';
for(auto [u,dd]:adj[v]){
if(dis[v]+dd<dis[u]){
dis[u]=dis[v]+dd;
pq.push({dis[u],u});
}
}
}
//for(int i=1;i<=8;i++)cout<<dis[i]<<' ';
//cout<<'\n';
return dis;
}
signed main(){
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
setio();
int n,m;
cin>>n>>m;
for(int i=0;i<m;i+=2){
int a,b,c,d;
cin>>a>>b>>c>>d;
int d2;
cin>>a>>b>>c>>d2;
d=min(d,d2);
e.pb({a,b,c,d});
adj[a].pb({b,c});
}
temp=dij(1,n);
vector<int>temp2=dij(n,1);
int ans=temp[n]+temp2[1];
for(auto [a,b,c,d]:e){
ans=min(ans,temp[b]+c+d+temp2[a]+temp2[1]);
ans=min(ans,temp2[b]+c+d+temp[a]+temp[n]);
ans=min(ans,temp[b]+c+d+temp2[a]+temp2[b]+c+d+temp[a]);
}
if(ans>=1e9){
cout<<-1<<'\n';
return 0;
}
cout<<ans<<'\n';
}
/*
*/
Compilation message
ho_t4.cpp: In function 'std::vector<long long int> dij(long long int, long long int)':
ho_t4.cpp:31:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
31 | auto [d,v]=pq.top();
| ^
ho_t4.cpp:35:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
35 | for(auto [u,dd]:adj[v]){
| ^
ho_t4.cpp: In function 'int main()':
ho_t4.cpp:64:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
64 | for(auto [a,b,c,d]:e){
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
12 ms |
1940 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
