Pagini recente » Cod sursa (job #1193859) | Cod sursa (job #2955379) | Cod sursa (job #3138135) | Cod sursa (job #1193857) | Cod sursa (job #1379776)
#include <fstream>
#include <algorithm>
#include <vector>
#include <queue>
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int N, M, x, D[50005];
const int inf=(1<<30);
struct asd{ int y, c; }aux;
struct cmp
{
bool operator()(const int &a, const int &b)const
{ return (D[a]>D[b]); }
};
vector < asd > G[50005];
priority_queue <int, vector <int>,cmp > Q;
void dijkstra(int sursa)
{
Q.push(sursa);
for (int i=1; i<=N; ++i)
D[i]=inf; D[sursa]=0;
while (Q.size())
{
int nod=Q.top(); Q.pop();
vector <asd>::iterator it=G[nod].begin();
for (; it!=G[nod].end(); ++it)
if ( D[nod] + it->c < D[it->y] )
D[it->y]=D[nod]+it->c, Q.push(it->y);
}
}
int main()
{
f>>N>>M;
for (int i=1; i<=M; ++i)
{
f>>x>>aux.y>>aux.c;
G[x].push_back(aux);
}
dijkstra(1);
for (int i=2; i<=N; ++i)
if (D[i]<inf) g<<D[i]<<' ';
else g<<0<<' ';
return 0;
}