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Cod sursa(job #612277)
#include <fstream>
#include <queue>
#include <vector>
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int n, m, x, y, c, dmin[50100];
vector < pair <int, int> > A[50100];
queue <int> Q;
void dijkstra()
{
for (int i = 2; i <= n; ++i) dmin[i] = 2000000000;
Q.push(1);
for (; !Q.empty(); Q.pop())
{
int nod = Q.front();
for (vector < pair <int, int> > :: iterator it = A[nod].begin(); it != A[nod].end(); ++it)
if (dmin[it -> first] > dmin[nod] + it -> second)
{
dmin[it -> first] = dmin[nod] + it -> second;
Q.push(it -> first);
}
}
}
int main()
{
f >> n >> m;
for (int i = 1; i <= m; ++i)
{
f >> x >> y >> c;
A[x].push_back(make_pair(y, c));
}
dijkstra();
for (int i = 2; i <= n; ++i, g << ' ')
if (dmin[i] == 2000000000)
g << "0";
else
g << dmin[i];
g.close ();
return 0;
}