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Cod sursa(job #886004)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("bellmanford.in");
ofstream fout("bellmanford.out");
#define NMAX 50005
vector <int> v[NMAX],cost[NMAX];
queue <int> qnod,qval;
int n,m,nr[NMAX],drum[NMAX];
bool viz[NMAX],ever[NMAX];
void read()
{
int a,b,c;
fin>>n>>m;
for(int i=1;i<=m;i++)
{
fin>>a>>b>>c;
v[a].push_back(b);
cost[a].push_back(c);
}
}
bool bfs()
{
int nod,val;
qnod.push(1);
while(!qnod.empty())
{
nod=qnod.front();
qnod.pop();
viz[nod]=false;
ever[nod]=true;
for(int i=0;i<v[nod].size();i++)
{
if(drum[nod]+cost[nod][i] < drum[v[nod][i]] || ever[v[nod][i]]==false)
{
ever[v[nod][i]]=true;
drum[v[nod][i]] = drum[nod]+cost[nod][i];
nr[v[nod][i]]++;
if(nr[v[nod][i]]>n)
return 1;
if(viz[v[nod][i]] == false)
qnod.push(v[nod][i]);
viz[v[nod][i]] = true;
}
}
}
return 0;
}
void tipar()
{
for(int i=1;i<=m;i++)
{
for(int j=0;j<v[i].size();j++)
{
fout<<i<<" "<<v[i][j]<<" "<<cost[i][j]<<endl;
}
}
}
int main()
{
read();
// tipar();
if(bfs()==1)
{
fout<<"Ciclu negativ!";
return 0;
}
for(int i=2;i<=n;i++)
fout<<drum[i]<<" ";
}