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Cod sursa(job #999339)
# include <cstring>
# include <iostream>
# include <fstream>
# include <vector>
# include <set>
using namespace std;
# define INF 0x3f3f3f3f
# define MAXN 50010
typedef vector< pair<int, int> > :: iterator iter;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int n, m;
vector<pair<int, int> > G[MAXN];
int dist[MAXN];
set< pair<int, int> > coada;
void dijkstra()
{
memset(dist, 0x3f, sizeof(dist));
dist[1] = 0;
coada.insert(make_pair(0, 1));
while (!coada.empty()) {
pair<int, int> nd = *coada.begin();
coada.erase(coada.begin());
for (iter it = G[nd.second].begin(); it != G[nd.second].end(); it++) {
if (dist[it->first] > dist[nd.second] + it->second) {
dist[it->first] = dist[nd.second] + it->second;
coada.insert(make_pair(dist[it->first], it->first));
}
}
}
for (int i = 2; i <= n; i++) {
if (dist[i] == INF) {
g << 0 << ' ';
} else {
g << dist[i] << ' ';
}
}
}
int main()
{
f >> n >> m;
for (int i = 1; i <= m; i++) {
int x, y, cost;
f >> x >> y >> cost;
G[x].push_back(make_pair(y, cost));
}
dijkstra();
return 0;
}