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Cod sursa(job #388619)
#include<stdio.h>
#include<string.h>
#include<vector>
#include<queue>
#include<bitset>
using namespace std;
#define pb push_back
#define N 50010
#define pii pair<int,int>
#define fs first
#define sc second
#define mp make_pair
const int inf=1<<30;
int n,m;
vector< pii > a[N];
int d[N];
int *nr[N];
bitset<N> inq;
queue<int> q;
inline void citire()
{
scanf("%d%d",&n,&m);
int x,y,z;
for(int i=0; i<m; ++i)
{
scanf("%d%d%d",&x,&y,&z);
a[x].pb(mp(y,z));
}
}
inline bool bellmanFord()
{
for(int i=1; i<=n; ++i)
{
nr[i]=new int[a[i].size()];
memset(nr[i],0,a[i].size()*sizeof(int));
d[i]=inf;
}
d[1]=0;
inq[1]=1;
q.push(1);
int now,next,cost;
while(!q.empty())
{
now=q.front();
q.pop();
inq[now]=0;
for(size_t i=0,lim=a[now].size(); i<lim; ++i)
{
next=a[now][i].fs;
cost=a[now][i].sc;
if(d[now]+cost<d[next])
{
++nr[now][i];
if(nr[now][i]==n)
return true;
d[next]=d[now]+cost;
if(inq[next]==0)
{
q.push(next);
inq[next]=1;
}
}
}
}
return false;
}
inline void scrie()
{
for(int i=2; i<n; ++i)
printf("%d ",d[i]);
printf("%d\n",d[n]);
}
int main()
{
freopen("bellmanford.in","r",stdin);
freopen("bellmanford.out","w",stdout);
citire();
if(bellmanFord())
{
fputs("Ciclu negativ!",stdout);
return 0;
}
scrie();
return 0;
}