Pagini recente » Cod sursa (job #497512) | Cod sursa (job #1125334) | Cod sursa (job #1304819) | Cod sursa (job #2436678) | Cod sursa (job #541038)
Cod sursa(job #541038)
#include<cstdio>
#include<utility>
#include<vector>
#include<deque>
#include<bitset>
#define NV it->first
#define DV it->second
using namespace std;
bitset<50002> q;
vector<pair<int,int> > v[50002];
deque<int> Q;
void read(),solve();
int n,L,D,N,cnt[50002],d[50002],oo=1<<30,i;
int main()
{
read();
solve();
return 0;
}
void read()
{
int x,y,c,m;
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);d[1]=0;q[1]=1;
for(;Q.size();)
{
for(it=v[Q.front()].begin();it!=v[Q.front()].end();it++)
if(d[Q.front()]+it->second<d[it->first])
{
if(!q[it->first])
{
q[it->first]=1;cnt[it->first]++;
if(cnt[it->first]>n)
{
printf("Ciclu negativ!\n");
return;
}
Q.push_back(it->first);
}
d[it->first]=d[Q.front()]+it->second;
}
q[Q.front()]=0;
Q.pop_front();
}
for(i=2;i<=n;i++)
printf("%d ",d[i]);
}