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Cod sursa(job #542722)
#include<cstdio>
#include<vector>
#include<utility>
#include<bitset>
#include<deque>
using namespace std;
int n,m,x,y,c,i,oo=1<<30,d[50010],cnt[50010];
vector<pair<int,int> > V[50010];
deque<int> Q;
bitset<50010> q;
void read(),solve();
int main()
{
read();
solve();
return 0;
}
void read()
{
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));
}
}
void solve()
{
vector<pair<int,int> >::iterator it;
for(i=2;i<=n;i++)d[i]=oo;
Q.push_back(1);q[1]=1;
for(;Q.size();)
{
x=Q.front();
for(it=V[x].begin();it!=V[x].end();it++)
{
y=it->first;
c=it->second;
if(d[x]+c<d[y])
{
if(!q[y])
{
q[y]=1;cnt[y]++;
if(cnt[y]>n){printf("Ciclu negativ!");return;}
Q.push_back(y);
}
d[y]=d[x]+c;
}
}
Q.pop_front();
q[x]=0;
}
for(i=2;i<=n;i++)printf("%d ",d[i]);
}