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Cod sursa(job #529368)
#include <cstdio>
#include <list>
#include <queue>
#include <bitset>
using namespace std;
#define NMAX 50001
#define COST_MAX 1<<29
int N, M, distances[NMAX], times_seen[NMAX];
list<pair<int, int> > adj_list[NMAX];
queue<int> q;
bool queued[NMAX];
void readInput() {
int from, to, cost;
freopen("bellmanford.in","r",stdin);
scanf("%d %d",&N,&M);
for (int i=0;i<M;i++) {
scanf("%d %d %d",&from,&to,&cost);
adj_list[from].push_back(make_pair(to,cost));
}
}
bool bellman_ford(int s) {
list<pair<int, int> >::iterator it;
for (int i=1;i<=N;i++) distances[i] = COST_MAX;
distances[s] = 0; q.push(s); queued[s] = true;
while (!q.empty()) {
int u = q.front(); q.pop(); queued[u] = false;
for (it=adj_list[u].begin();it!=adj_list[u].end();it++) {
if (distances[it->first] > distances[u]+it->second) {
distances[it->first] = distances[u]+it->second;
if (!queued[it->first]) {
if (++times_seen[it->first] > N) {
return false;
}
q.push(it->first); queued[it->first] = true;
}
}
}
}
return true;
}
int main() {
readInput();
freopen("bellmanford.out","w",stdout);
if (bellman_ford(1)) {
for (int i=2;i<=N;i++) {
printf("%d ",distances[i]);
}
}
else {
printf("Ciclu negativ!");
}
printf("\n");
return 0;
}