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Cod sursa(job #824463)
#include<cstdio>
#include<deque>
#include<utility>
#include<vector>
#define N 50010
using namespace std;
int n,m,x,y,c,q[N],C[N],cnt[N];
vector<pair<int, int> > v[N] ;
deque<int> Q;
void bellman();
int main()
{
freopen("bellmanford.in","r",stdin);
freopen("bellmanford.out","w",stdout);
scanf("%d%d",&n,&m);
for(;m;m--)
{
scanf("%d%d%d",&x,&y,&c);
v[x].push_back(make_pair(y,c));
}
bellman();
return 0;
}
void bellman()
{
int oo=100000000,i;
vector<pair<int,int> >::iterator it;
for(i=1;i<=n;i++)
C[i]=oo;
C[1]=0;
Q.push_back(1);
q[1]=1;
for(;Q.size();)
{
i=Q.front();Q.pop_front();
q[i]=0;
for(it=v[i].begin();it!=v[i].end();it++)
{
if(C[it->first]<=C[i]+it->second) continue;
C[it->first]=C[i]+it->second;
cnt[it->first]++;
if(cnt[it->first]>=n)
{
printf("Ciclu negativ!\n");
return ;
}
if(!q[it->first])
{
Q.push_back(it->first);
q[it->first]=1;
}
}
}
for(i=2;i<=n;i++) printf("%d ",C[i]);
}