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Cod sursa(job #949766)
#include<fstream>
#include<queue>
#include<vector>
using namespace std;
queue <int> v;
vector <int> a[50001],c[50001];
int d[50001],w[500001],i,n,m,x,y,z,j;
int main()
{
ifstream f("bellmanford.in");
ofstream g("bellmanford.out");
f >> n >> m;
for (i=1;i<=m;i++)
{
f >> x >> y >> z;
a[x].push_back(y);
c[x].push_back(z);
}
for (i=2;i<=n;i++)
d[i]=1 << 30;
v.push(1);
while (!v.empty())
{
x=v.front();
w[x]++;
if (w[x]>n)
{
g << "Ciclu negativ!";
return 0;
}
for (j=0;j<a[x].size();j++)
if (d[x]+c[x][j]<d[a[x][j]])
{
d[a[x][j]]=d[x]+c[x][j];
v.push(a[x][j]);
}
v.pop();
}
for (i=2;i<=n;i++)
g << d[i] << ' ';
return 0;
}