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Cod sursa(job #703805)
#include<fstream>
#define maxn 50010
#include<vector>
#include<bitset>
#include<cstdlib>
#include<queue>
#define inf 1<<30
using namespace std;
ifstream in("bellmanford.in");
ofstream out("bellmanford.out");
queue<int>q;
int cnt[maxn];
vector<pair<int,int> >a[maxn];
bool uz[maxn];
int d[maxn];
int n,m;
void read()
{
in>>n>>m;
int x,y,z;
for(int i=1;i<=m;i++)
{
in>>x>>y>>z;
a[x].push_back(make_pair(y,z));
}
for(int i=2;i<=n;i++)
d[i]=inf;
}
void bellmanford()
{
q.push(1);
d[1]=0;
uz[1]=true;
while(!q.empty())
{
int nod=q.front();
q.pop();
uz[nod]=false;
for(int i=0;i<a[nod].size();i++)
{
int nodc=a[nod][i].first;
if(d[nodc]>d[nod]+a[nod][i].second)
{
d[nodc]=d[nod]+a[nod][i].second;
if(uz[nodc]==false)
{
q.push(nodc);
uz[nodc]=true;
cnt[nodc]++;
if(cnt[nodc]>n){out<<"Ciclu negativ!";exit(0);}
}
}
}
}
}
int main()
{
read();
bellmanford();
for(int i=2;i<=n;i++)
out<<d[i]<<" ";
}