Pagini recente » Cod sursa (job #1486278) | Cod sursa (job #1690691) | Cod sursa (job #1234281) | Cod sursa (job #949153) | Cod sursa (job #1919183)
#include <cstdio>
#include <vector>
#include <queue>
#include <cstdlib>
#define PII pair<int,int>
using namespace std;
const int NMAX=50000;
const int inf=2e9;
int n,m,i;
int nr[NMAX+5],D[NMAX+5];
bool used[NMAX+5];
vector <PII> G[NMAX+5];
queue <int> q;
void solve()
{
int node,i,s,son,cost;
q.push(1);
while(!q.empty())
{
node=q.front();
q.pop();
used[node]=0;
s=G[node].size();
for(i=0; i<s; ++i)
{
son=G[node][i].first;
cost=G[node][i].second;
if(D[son]>D[node]+cost)
{
if(nr[son]==n-1)
{
printf("Ciclu negativ!\n");
exit(0);
}
++nr[son];
D[son]=D[node]+cost;
if(!used[son])
q.push(son);
}
}
}
}
int main()
{
freopen("bellmanford.in","r",stdin);
freopen("bellmanford.out","w",stdout);
scanf("%d%d",&n,&m);
for(i=1; i<=m; ++i)
{
int x,y,c;
scanf("%d%d%d",&x,&y,&c);
G[x].push_back(make_pair(y,c));
}
for(i=2; i<=n; ++i)
D[i]=inf;
solve();
for(i=2; i<=n; ++i)
printf("%d ",D[i]);
return 0;
}