Pagini recente » Cod sursa (job #3186834) | Cod sursa (job #2531115) | Cod sursa (job #370479) | Cod sursa (job #1850348) | Cod sursa (job #2950960)
#include <fstream>
#include <vector>
#include <bitset>
#include <algorithm>
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("Ofast")
#define inf 0x7fffffff
using namespace std;
ifstream in("bellmanford.in");
ofstream out("bellmanford.out");
bool negative_cycle = false;
int N, M;
vector<int> dist, tata;
struct edge{
int from;
int to;
int cost;
};
vector<struct edge> E;
void bellman_ford(int s){
dist.resize(N+1, inf);
tata.resize(N+1, 0);
dist[s] = 0;
for (int i = 0; i < N-1; ++i) {
for (struct edge edge : E)
if (dist[edge.from] + edge.cost < dist[edge.to])
dist[edge.to] = dist[edge.from] + edge.cost;
}
for (int i = 0; i < N-1; ++i) {
for (struct edge edge : E)
if (dist[edge.from] + edge.cost < dist[edge.to])
negative_cycle = 1;
}
}
int main()
{
in >> N >> M;
E.resize(M);
for (int i = 0; i < M; ++i) {
in >> E[i].from >> E[i].to >> E[i].cost;
}
in.close();
bellman_ford(1);
if(negative_cycle)
out << "Ciclu negativ!";
else
for (int i = 2; i <= N; ++i){
out << dist[i] << ' ';
}
out.close();
return 0;
}