Pagini recente » Sandbox (cutiuţa cu năsip) | Cod sursa (job #1359685) | Cod sursa (job #1697753) | Cod sursa (job #2793807) | Cod sursa (job #1318513)
#include <fstream>
#include <list>
#include <queue>
#define DIM 50001
#define INF 999990
using namespace std;
int n,m,x,y,c,d[DIM];
list<pair <int,int> > nod[DIM];
struct point
{
int x;
bool operator <(const point &other) const
{
return d[x] > d[other.x];
}
};
priority_queue<point> cd;
void dijkstra(int k)
{
point q;
q.x=k;
cd.push(q);
while(!cd.empty())
{
point vf=cd.top();
for(list<pair<int,int> >::iterator i=nod[vf.x].begin();i!=nod[vf.x].end();++i)
{
std::pair<int,int> z=*i;
if(d[z.first]>d[vf.x]+z.second)
{
d[z.first]=d[vf.x]+z.second;
q.x=z.first;
cd.push(q);
}
}
cd.pop();
}
}
int main()
{
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
f>>n>>m;
for(int i=1;i<=m;++i)
{
f>>x>>y>>c;
nod[x].push_back(make_pair(y,c));
nod[y].push_back(make_pair(x,c));
}
for(int i=2;i<=n;++i)
d[i]=INF;
dijkstra(1);
for(int i=2;i<=n;++i)
{
if(d[i]==INF) g<<"0 ";
else
g<<d[i]<<" ";
}
g<<'\n';
f.close();
g.close();
return 0;
}