Pagini recente » Viata de dupa olimpiade? (partea I) | Cod sursa (job #3286943)
#include <fstream>
#include <map>
#include <vector>
#include <algorithm>
#include <queue>
using namespace std;
ifstream cin("dijkstra.in");
ofstream cout("dijkstra.out");
int n,m;
int dmin[50005];
struct per
{
vector <int> dest,cost;
}v[50005];
int calc()
{
priority_queue <pair <int,int> ,vector <pair <int,int>> , greater <pair<int,int>> > q;
q.push({0,1});
for(int i=1;i<=n;i++)
{
dmin[i]=(1<<30);
}
dmin[1]=0;
while(!q.empty())
{
int c=q.top().first,nod=q.top().second;
q.pop();
for(int i=0;i<v[nod].dest.size();i++)
{
int aj=v[nod].dest[i],co=v[nod].cost[i];
if(dmin[aj]>dmin[nod]+co)
{
dmin[aj]=dmin[nod]+co;
q.push({dmin[aj],aj});
}
}
}
return 0;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin>>n>>m;
for(int i=1;i<=m;i++)
{
int a,b,c;
cin>>a>>b>>c;
v[a].dest.push_back(b);
v[a].cost.push_back(c);
}
calc();
for(int i=2;i<=n;i++)
{
cout<<dmin[i]<<" ";
}
return 0;
}