Pagini recente » Cod sursa (job #2390344) | Cod sursa (job #750079) | Cod sursa (job #39769) | Cod sursa (job #2941543) | Cod sursa (job #2685094)
#include <fstream>
#include <queue>
#include <vector>
#define f first
#define s second
using namespace std;
ifstream in ("bellmanford.in");
ofstream out ("bellmanford.out");
vector<pair<int,int> > v[50001];
priority_queue<pair<int,int>,vector<pair<int,int> >,greater<pair<int,int> > > h;
int d[50001],n,m,a,b,c,nod,i;
int viz[50001];
int main()
{
in>>n>>m;
for(i=1;i<=m;i++)
{
in>>a>>b>>c;
v[a].push_back(make_pair(c,b));
}
for(i=1;i<=n;i++)
d[i]=10000000001;
d[1]=0;
h.push(make_pair(0,1));
while(!h.empty())
{
nod=h.top().s;
h.pop();
for(i=0;i<v[nod].size();i++)
{
if(d[v[nod][i].s]>d[nod]+v[nod][i].f)
{
viz[v[nod][i].s]++;
d[v[nod][i].s]=d[nod]+v[nod][i].f;
h.push(make_pair(d[v[nod][i].s],v[nod][i].s));
if(viz[v[nod][i].s]==n)
{
out<<"Ciclu negativ!";
return 0;
}
}
}
}
for(i=2;i<=n;i++)
{
out<<d[i]<<" ";
}
return 0;
}