Pagini recente » Cod sursa (job #2956244) | Cod sursa (job #2223154) | Cod sursa (job #1440114) | Cod sursa (job #1961246) | Cod sursa (job #3156044)
#include <algorithm>
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
#define pii pair <int, int>
string filename = "bellmanford";
#ifdef LOCAL
ifstream fin("input.in");
ofstream fout("output.out");
#else
ifstream fin(filename + ".in");
ofstream fout(filename + ".out");
#endif
const int NMAX = 5e4;
const int INF = 1e9;
vector <pii> adj[NMAX + 1];
int dist[NMAX + 1];
int f[NMAX + 1];
bool inQ[NMAX + 1];
int main(){
int n, m;
fin >> n >> m;
for(int i = 1; i <= m; i++){
int a, b, c;
fin >> a >> b >> c;
adj[a].push_back({b, c});
}
queue <int> Q;
Q.push(1);
for(int i = 2; i <= n; i++){
dist[i] = INF;
}
inQ[1] = true;
while(!Q.empty()){
int node = Q.front();
Q.pop();
inQ[node] = false;
if(++f[node] > n){
fout << "Ciclu negativ!\n";
return 0;
}
for(pii vec : adj[node]){
if(vec.second + dist[node] < dist[vec.first]){
dist[vec.first] = vec.second + dist[node];
if(!inQ[vec.first]){
Q.push(vec.first);
}
}
}
}
for(int i = 2; i <= n; i++){
fout << dist[i] << ' ';
}
fout << '\n';
return 0;
}