Pagini recente » Cod sursa (job #2493643) | Cod sursa (job #2016794) | Cod sursa (job #2482521)
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <cstring>
#define pb push_back
#define inf 0x3f3f3f3f
using namespace std;
ifstream in("bellmanford.in");
ofstream out("bellmanford.out");
int n,m,a,b,c,dmin[50005],x,y,fr[50005];
struct eee
{
int nod,cost;
};
vector<eee> v[50005];
queue<eee> q;
int main()
{
in>>n>>m;
for(int i=1;i<=m;i++)
{
in>>a>>b>>c;
v[a].pb({b,c});
}
memset(dmin,inf,sizeof dmin);
dmin[1]=0;
q.push({1,0});
int ok=1;
while(!q.empty())
{
x=q.front().nod;
y=q.front().cost;
q.pop();
if(fr[x]+1<=n && ok)
{
fr[x]++;
for(auto i:v[x])
{
if(dmin[i.nod]>dmin[x]+i.cost)
{
dmin[i.nod]=dmin[x]+i.cost;
q.push({i.nod,dmin[i.nod]});
}
}
}
else ok=0;
}
if(!ok)
{
out<<"Ciclu negativ!";
}
else for(int i=2;i<=n;i++)
{
out<<dmin[i]<<' ';
}
return 0;
}