Pagini recente » Cod sursa (job #2107049) | Cod sursa (job #19969) | Cod sursa (job #2883463) | Cod sursa (job #1514876) | Cod sursa (job #2869997)
#include <bits/stdc++.h>
using namespace std;
#define inf 2e9
ifstream in("bellmanford.in");
ofstream out("bellmanford.out");
struct ura{
int first,second;
};
vector<ura> v[50001];
deque<int> q;
int ok[50001],dp[50001],cate[50001];
int main()
{
int n,m,i,first,nod,nod1,cost,x,y,k;
in>>n>>m;
for(i=1;i<=m;++i)
{
in>>x>>y>>cost;
v[x].push_back({y,cost});
}
bool ok_ciclu=false;
for(i=1;i<=n;++i)
dp[i]=inf;
first=1;
q.push_back(first);
dp[first]=0;
ok[first]=1;
while(!q.empty() && !ok_ciclu){
nod=q.front();
ok[nod]=0;
q.pop_front();
for(k=0;k<v[nod].size();++k)
{
nod1=v[nod][k].first;
cost=v[nod][k].second;
if(dp[nod]+cost<dp[nod1]){
dp[nod1]=dp[nod]+cost;
if(!ok[nod1]){
++cate[nod1];
if(cate[nod1]>=n)
{
ok_ciclu=1;
break;
}
else
{
ok[nod1]=1;
q.push_back(nod1);
}
}
}
}
}
if(ok_ciclu==true)
out<<"Ciclu negativ!";
else
{
for(i=2;i<=n;++i)
out<<dp[i]<<" ";
}
return 0;
}