Pagini recente » Cod sursa (job #1811392) | Cod sursa (job #2908631) | Cod sursa (job #1324997) | Cod sursa (job #1545682) | Cod sursa (job #2548449)
#include <bits/stdc++.h>
#define INF 1<<30
#define nmax 50001
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int n,s,x,y,c,d[nmax],m,i,k,min1;
vector <pair<int,int> >v[nmax];
bool viz[nmax];
int main()
{
f>>n>>m;
for(i =1 ; i <= n ; i ++ )
d[i]=INF;
for(i=1; i<=m; i++)
{
f>>x>>y>>c;
v[x].push_back(make_pair(y,c));
if(x==1)
d[y]=c;
}
s=1;//nodul radacina
viz[s]=1;
d[s]=0;
d[0]=INF;
for(k=1; k<n; k++)
{
min1=0;
for(i=1; i<=n; i++)
if(!viz[i]&&d[i]<d[min1])
min1=i;
if(min1)
{
viz[min1]=1;
for(i=0; i<v[min1].size(); i++)
{
x=v[min1][i].first;
if(!viz[x]&&d[x]>d[min1]+v[min1][i].second)
d[x]=d[min1]+v[min1][i].second;
}
}
}
for(i=2; i<=n; i++)
if(d[i]==INF)
g<<0<<" ";
else
g<<d[i]<<" ";
return 0;
}