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Cod sursa(job #409852)
#include <fstream>
#include <vector>
#include <algorithm>
#include <queue>
using namespace std;
const int MAXN = 50005;
const int INF = 1000000;
int n, m;
vector< pair<int, int> > G[MAXN];
int Dmin[MAXN];
void citeste()
{
ifstream f("dijkstra.in");
f >> n >> m;
for (int i = 0; i < m; ++i)
{
int a, b, c;
f >> a >> b >> c;
G[a].push_back(make_pair(b, c));
}
}
void dijkstra()
{
bool viz[MAXN];
queue<int> Q;
memset(Dmin, INF, sizeof(Dmin));
memset(viz, false, sizeof(viz));
Dmin[1] = 0;
Q.push(1);
viz[1] = true;
while (!Q.empty())
{
int nod = Q.front();
Q.pop();
viz[nod] = false;
for (vector< pair<int, int> >::iterator it = G[nod].begin(); it != G[nod].end(); ++it)
if (Dmin[nod] + it->second < Dmin[it->first])
{
Dmin[it->first] = Dmin[nod] + it->second;
if (!viz[it->first])
{
Q.push(it->first);
viz[it->first] = true;
}
}
}
}
void afisare()
{
ofstream g("dijkstra.out");
for (int i = 2; i <= n; ++i)
g<< (Dmin[i] < INF ? Dmin[i] : 0) << " ";
}
int main()
{
citeste();
dijkstra();
afisare();
}