Pagini recente » Cod sursa (job #2598615) | Cod sursa (job #2840997) | Cod sursa (job #657237) | Cod sursa (job #1623594) | Cod sursa (job #2806151)
#include <fstream>
#define N 50002
#include <vector>
#define INF 2000000000
#include <deque>
using namespace std;
ifstream f("bellmanford.in");
ofstream g("bellmanford.out");
struct bla
{
int ve, co;
};
vector <bla> graph[N];
int fr[N], dr[N], n;
deque <int> q;
void bf(int nod)
{
q.push_back(nod);
while (!q.empty())
{
nod = q.front();
q.pop_front();
for (int i = 0;i < graph[nod].size();++i)
{
int vee = graph[nod][i].ve;
if (dr[vee] > dr[nod] + graph[nod][i].co)
{
dr[vee] = dr[nod] + graph[nod][i].co;
q.push_back(vee);
++fr[vee];
if (fr[vee] > n)
{
g << "Ciclu negativ!";
return;
}
}
}
}
for (int i = 2;i <= n;++i)
g << dr[i] << ' ';
}
int main()
{
int m, x, y, c;
f >> n >> m;
while (m--)
{
f >> x >> y >> c;
graph[x].push_back({ y,c });
}
for (int i = 2;i <= n;++i) dr[i] = INF;
bf(1);
f.close();
g.close();
return 0;
}