Pagini recente » Cod sursa (job #410549) | Cod sursa (job #1003587) | Cod sursa (job #165526) | Cod sursa (job #1994712) | Cod sursa (job #1533313)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("bellmanford.in");
ofstream fout("bellmanford.out");
struct data
{
int val,nod;
};
int n,m,minim[50001],viz[50001],nr,ok;
vector<data> ma[50001];
queue<int> c;
void citire()
{
int i,x,y,c;
data aux;
fin>>n>>m;
for(i=1;i<=m;i++)
{
fin>>x>>y>>c;
aux.val=c;
aux.nod=y;
ma[x].push_back(aux);
}
minim[1]=0;
for(i=2;i<=n;i++)
minim[i]=1000*n;
}
void afisare()
{
int i;
for(i=2;i<=n;i++)
fout<<minim[i]<<' ';
}
void rezolvare()
{
int x,i;
data y;
c.push(1);
nr++;
while(c.size()!=0)
{
x=c.front();
c.pop();
viz[x]=0;
for(i=0;i<ma[x].size();i++)
{
y=ma[x][i];
if(minim[y.nod]>minim[x]+y.val)
{
minim[y.nod]=minim[x]+y.val;
if(viz[y.nod]==0)
{
c.push(y.nod);
nr++;
viz[y.nod]=1;
}
if(nr>(n+1)*(m+1))
{
fout<<"Ciclu negativ!"<<'\n';
ok=1;
break;
}
}
}
if(ok==1)
break;
}
if(ok==0)
afisare();
}
int main()
{
citire();
rezolvare();
fout.close();
return 0;
}