Pagini recente » Cod sursa (job #2494653) | Cod sursa (job #1901613) | Cod sursa (job #976873) | Cod sursa (job #2948661) | Cod sursa (job #2172821)
#include <iostream>
#include <fstream>
#include <queue>
#include <vector>
using namespace std;
#define NMax 50005
#define oo (1 << 30)
ifstream fin("bellmanford.in");
ofstream fout("bellmanford.out");
int n, m, ap[NMax], D[NMax];
vector < pair < int, int> > G[NMax];
queue <int> q;
int bellmanford(int start)
{
for(int i = 1; i <= n; i++)
D[i] = oo;
D[start] = 0;
q.push(start);
while(!q.empty())
{
int nod = q.front();
q.pop();
ap[nod]++;
if(ap[nod] > n) return 0;
for(int i = 0; i < G[nod].size(); i++)
{
int v = G[nod][i].first;
int c = G[nod][i].second;
if(D[nod] + c < D[v])
{
D[v] = D[nod] + c;
q.push(v);
}
}
}
return 1;
}
int main()
{
fin >> n >> m;
for(int i = 1; i <= m; i++)
{
int x, y, c;
fin >> x >> y >> c;
G[x].push_back({y, c});
}
if(!bellmanford(1))
fout << "Ciclu negativ!";
else
{
for(int i = 2; i <= n; i++)
fout << D[i] << " ";
}
}