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Cod sursa(job #884514)
#include <iostream>
#include <cstdio>
#include <vector>
#include <queue>
#define INF 2000000000
using namespace std;
int n,m,d[50010],ordin[50010];
struct NOD
{
int x,cost;
};
vector <NOD> L[50010];
queue <int> q;
inline void Read()
{
int i,x;
NOD aux;
freopen("bellmanford.in","r",stdin);
scanf("%d %d", &n, &m);
for( i=1; i<=m; i++ )
{
scanf("%d %d %d",&x,&aux.x,&aux.cost);
L[x].push_back(aux);
}
}
inline bool BellmanFord()
{
int i,x,pr,ul;
NOD aux;
for(i=1; i<=n ;i++)
d[i]=INF;
d[1]=0;
q.push(1);
while(!q.empty())
{
x=q.front();
q.pop();
for(i=0;i<L[x].size();i++)
{
aux=L[x][i];
if(d[aux.x]>d[x]+aux.cost)
{
q.push(aux.x);
d[aux.x]=d[x]+aux.cost;
ordin[aux.x] = ordin[x] + 1;
if (ordin[aux.x] > n)
return true;
}
}
}
return false;
}
inline void Write(bool ciclu)
{
freopen("bellmanford.out","w",stdout);
if(ciclu)
{
printf("Ciclu negativ!\n");
}
else
{
int i;
for(i=2; i<=n; i++)
printf("%d ",d[i]);
printf("\n");
}
}
int main()
{
bool ciclu;
Read();
ciclu=BellmanFord();
Write(ciclu);
return 0;
}