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Cod sursa(job #639656)
#include <fstream>
#include <vector>
#include <queue>
#include <bitset>
#define NMAX 50002
using namespace std;
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
int D[NMAX],N,M;
class cmp
{
public:
inline bool operator()(const int&a,const int&b){return D[a]>D[b];}
};
vector<pair<int,int> > V[NMAX];
priority_queue<int,vector<int>,cmp> Heap;
bitset<NMAX> In_Heap;
int main()
{
int x,y,c,i;
in>>N>>M;
for(x=1;x<=N;x++)D[x] = NMAX;
while(M--)
{
in>>x>>y>>c;
V[x].push_back(make_pair(y,c));
V[y].push_back(make_pair(x,c));
}
//plec din nodul 1
D[1] = 0;
for(Heap.push(1);!Heap.empty();Heap.pop())
{
x = Heap.top();
for(i=0;i<V[x].size();i++)
{
y = V[x][i].first;
c = V[x][i].second;
if(D[y]>D[x]+c)
{
D[y] = D[x]+c;
if(!In_Heap[y])
Heap.push(y),In_Heap[y] = 1;
}
}
}
for(x=2;x<=N;x++)out<<D[x]<<' ';
return 0;
}