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Cod sursa(job #656767)
#include<stdio.h>
#include<vector>
#include<algorithm>
#include<queue>
using namespace std;
#define NMAX 50005
typedef struct
{
int nod,c;
} p;
vector <p> g[NMAX];
bool ut[NMAX];
vector <int> cost(NMAX,(1<<30));
int n,m,steps;
queue <int> Q;
int main()
{
freopen("bellmanford.in","r",stdin);
freopen("bellmanford.out","w",stdout);
scanf("%d%d",&n,&m);
for(int i=1;i<=m;i++)
{
p y;
int x;
scanf("%d%d%d",&x,&y.nod,&y.c);
g[x].push_back(y);
}
cost[1]=0;
Q.push(1);
ut[1]=1;
vector <p> ::iterator it;
while(!Q.empty()&&steps<=1LL*n*m)
{
int nod=Q.front();
Q.pop();
ut[nod]=0;
for(it=g[nod].begin();it!=g[nod].end();it++)
{
if(cost[it->nod]<=cost[nod]+it->c)
continue;
cost[it->nod]=cost[nod]+it->c;
if(!ut[it->nod])
{
ut[it->nod]=1;
Q.push(it->nod);
}
++steps;
}
}
for(int i=1;i<=n;i++)
{
for(it=g[i].begin();it!=g[i].end();it++)
if(cost[i]+it->c<cost[it->nod])
{
printf("Ciclu negativ!\n");
return 0;
}
}
for(int i=2;i<=n;i++)
printf("%d ",cost[i]);
return 0;
}