Pagini recente » Cod sursa (job #1888250) | Cod sursa (job #1242048) | Cod sursa (job #1681755) | Cod sursa (job #2867054) | Cod sursa (job #900872)
Cod sursa(job #900872)
#include <fstream>
#include <cstdlib>
#include <vector>
#include <queue>
#include <bitset>
#define inf 1<<30
#define maxn 50010
using namespace std;
bitset<maxn> inqueue;
queue<int> q;
int cnt[maxn];
vector<pair<int,int> > a[maxn];
ifstream in("bellmanford.in");
ofstream out("bellmanford.out");
int n,m;
int d[maxn];
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));
}
}
void bellman()
{
d[1]=0;
q.push(1);
while(!q.empty())
{
int nod=q.front();
q.pop();
inqueue[nod]=0;
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(inqueue[nodc]==0)
{
inqueue[nodc]=1;
q.push(nodc);
cnt[nodc]++;
if(cnt[nodc]>n) {out<<"Ciclu negativ!";exit(0);}
}
}
}
}
}
int main()
{
read();
for(int i=1;i<=n;i++) d[i]=inf;
bellman();
for(int i=2;i<=n;i++)
out<<d[i]<<" ";
return 0;
}