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Cod sursa(job #556469)
#include<cstdio>
#include<queue>
#define Nmx 50001
#define INF 2000001
using namespace std;
int n,m,dist[Nmx],viz[Nmx];
struct nod
{
int inf,cost;
nod *urm;
};
nod *G[Nmx];
queue<int>Q;
void add(int x,int y,int c)
{
nod *aux=new nod;
aux->inf = y;
aux->cost = c;
aux->urm = G[x];
G[x] = aux;
}
void citire()
{
int x,y,c;
scanf("%d%d",&n,&m);
for(int i=1;i<=m;++i)
{
scanf("%d%d%d",&x,&y,&c);
add(x,y,c);
}
}
void afisare()
{
freopen("bellmanford.in","r",stdin);
freopen("bellmanford.out","w",stdout);
scanf("%d%d",&n,&m);
int x,y,c;
for(int i=1;i<=m;++i)
{
scanf("%d%d%d",&x,&y,&c);
if(dist[x]+c<dist[y])
{
printf("Ciclu negativ!\n");
return ;
}
}
for(int i=2;i<=n;++i)
if(dist[i]==INF)
printf("0 ");
else printf("%d ",dist[i]);
printf("\n");
}
void solve()
{
for(int i=2;i<=n;++i)
dist[i]=INF;
Q.push(1);
viz[1]=1;
long long pas=0;
while(!Q.empty()&&pas<=(long long)n*m)
{
++pas;
int x = Q.front();
viz[x]=0;
Q.pop();
for(nod *p=G[x];p;p=p->urm)
if(p->cost+dist[x]<dist[p->inf])
{
dist[p->inf]=p->cost+dist[x];
if(viz[p->inf]==0)
{
Q.push(p->inf);
viz[p->inf]=1;
}
}
}
afisare();
}
int main()
{
freopen("bellmanford.in","r",stdin);
freopen("bellmanford.out","w",stdout);
citire();
solve();
return 0;
}