#include <bits/stdc++.h>
//code
#define fl(i,x,y,z) for(int i=x;i<=y;i=i+z)
#define fn(i,x,y,z) for(int i=x;i>=y;i=i-z)
#define rep(i,x,y) for(int i=x;i<y;i=i+1)
#define all(v) v.begin(),v.end()
#define pb push_back
#define tle cout<<"tle"<<endl
#define edl cout<<"\n"
#define el "\n"
#define getbit(x,i) ((x>>i)&1)
#define bitcnt __builtin_popcount
//ham
#define pii pair<long long,long long>
#define fi first
#define se second
#define ll long long
#define ld long double
#define inf 0x3f3f3f3f
//#define int long long
#define mp make_pair
using namespace std;
const ll mod=1e9+7;
int n,m;
struct kb
{
int v,c,p;
};
vector <pair<int,pii>> e[100005];
vector <pii> a[100005];
int vis[1000005],t[1000005];
ll d[1000005];
priority_queue <pii,vector <pii>, greater <pii>> q;
//void inp()
//{
// cin>>n>>m;
// fl(i,1,m,1)
// {
// int u,v,c,p;
// cin>>u>>v>>c>>p;
// e[u].pb({v,{c,p}});
// e[v].pb({u,{c,p}});
// a[u].pb({v,p});
// a[v].pb({u,p});
//
// }
//}
void dij()
{
fl(i,1,n,1) d[i]=1e18;
d[1]=0;
q.push({d[1],1});
while (!q.empty())
{
int u=q.top().se;
int c=q.top().fi;
q.pop();
if (vis[u]) continue;
vis[u]=1;
for (auto it: a[u])
{
int v=it.fi,w=it.se;
if (vis[v]==false && d[v]>d[u]+w)
{
d[v]=d[u]+w;
q.push({d[v],v});
}
}
}
}
//void sol()
//{
// int cur = n;
// fl(i,1,n,1)
// {
// sort(e[i].begin(), e[i].end());
// for (auto it : e[i])
// t[it.fi] += it.se.se;
// for (auto it : e[i])
// {
// if (!vis[it.fi])
// {
// ++cur;
// a[i].push_back({cur,0});
// }
// vis[it.fi]=1;
// a[cur].push_back({it.se.fi, t[it.fi]-it.se.se});
// a[it.se.fi].push_back({cur, 0});
// }
// for (auto it : e[i])
// {
// t[it.fi] = 0;
// vis[it.fi] = 0;
// }
// }
// dij();
//}
void dij(int x)
{
fl(i,1,n,1) d[i] = 1e9;
priority_queue< pair < int,int > , vector < pair < int ,int > > , greater < pair < int , int > > > q;
d[x] = 0;
q.push(mp(0, x));
while (!q.empty())
{
auto p1 = q.top();
int W = p1.fi;
int x = p1.se;
q.pop();
if (vis[x])
continue;
vis[x] = 1;
for (auto p2 : a[x])
{
int y = p2.fi;
int w = p2.se;
if (vis[y] || d[y] < W + w)
continue;
d[y] = W + w;
q.push({W + w, y});
}
}
}
void sol()
{
cin >> n >> m;
fl(i,1,m,1)
{
int x,y,c,p;
cin >> x >> y >> c >> p;
e[x].push_back({c, {y, p}});
e[y].push_back({c, {x, p}});
a[x].push_back({y, p});
a[y].push_back({x, p});
}
int cur = n;
fl(i,1,n,1)
{
sort(e[i].begin(), e[i].end());
for (auto it : e[i])
t[it.fi] += it.se.se;
for (auto it : e[i])
{
if (!vis[it.fi])
{
++cur;
a[i].push_back(mp(cur,0));
}
vis[it.fi] = 1;
a[cur].push_back(mp(it.se.fi, t[it.fi] - it.se.se));
a[it.se.fi].push_back(mp(cur, 0));
}
for (auto it : e[i])
{
t[it.fi] = 0;
vis[it.fi] = 0;
}
}
dij();
if (d[n] == 1e0)
cout << "-1";
else
cout << d[n];
// return 0;
}
signed main()
{
// freopen("task.inp","r",stdin);
// freopen("task.out","w",stdout);
ios_base::sync_with_stdio(false);
cin.tie(NULL);
// inp();
sol();
return 0;
}
/* /\_/\
( ._. )
/ >V< \
*/
Compilation message
Main.cpp: In function 'void dij()':
Main.cpp:56:13: warning: unused variable 'c' [-Wunused-variable]
56 | int c=q.top().fi;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
4952 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
58 ms |
25644 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
4952 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
