Pagini recente » Cod sursa (job #1378339) | Cod sursa (job #2418447) | Cod sursa (job #1196265) | Cod sursa (job #1393814) | Cod sursa (job #2152274)
#include <bits/stdc++.h>
#define inf 10000000
#define pb push_back
#define st first
#define dr second
#define p push
#define f front
using namespace std;
ifstream fin("bellmanford.in");
ofstream fout("bellmanford.out");
int n, m, viz[50005], frecv[50005], drum[50005];
vector <pair<int, int> > L[50005];
queue <int> q;
void Citire()
{
int x, y, c;
fin >> n >> m;
for(int i = 1; i <= m; i++)
{
fin >> x >> y >> c;
L[x].pb({y, c});
}
}
void Init()
{
for(int i = 1; i <= n; i++)
drum[i] = inf;
}
void Rez()
{
int el;
q.p(1);
viz[1] = 1;
Init();
drum[1] = 0;
frecv[1] = 1;
bool ciclu = 0;
while(!q.empty() && !ciclu)
{
el = q.f();
q.pop(); viz[el] = 0;
for(auto i : L[el])
{
int nod = i.st;
int cost = i.dr;
if(drum[nod] > drum[el] + cost)
{
drum[nod] = drum[el] + cost;
if(!viz[nod])
{
viz[nod] = 1;
if(++frecv[nod] > n) ciclu = 1;
q.p(nod);
}
}
}
}
if(ciclu)
fout << "Ciclu negativ\n";
else for(int i = 2; i <= n; i++)
fout << drum[i] << " ";
}
int main()
{
Citire();
Rez();
return 0;
}