Pagini recente » Cod sursa (job #852064) | Cod sursa (job #2001876) | Cod sursa (job #1737545) | Cod sursa (job #2207856) | Cod sursa (job #1893952)
#include <fstream>
#include <queue>
#include <vector>
#define inf 1<<30
#define nmax 50005
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int n, m, d[nmax];
vector<pair<int,int> >v[nmax];
vector<pair<int,int> >::iterator it;
priority_queue<pair<int,int>,vector<pair<int,int> >,greater< pair<int,int> > >heap;
void dijsktra()
{ int x, i, y, z;
d[1]=0;
for(i=2;i<=n;i++)
d[i]=inf;
heap.push(make_pair(0,1));
while(!heap.empty())
{
x=heap.top().second;
heap.pop();
for(it=v[x].begin();it!=v[x].end();it++){
y=it->first;
z=it->second;
if(d[y]>d[x]+z){
d[y]=d[x]+z;
heap.push(make_pair(d[y],y));
}
}
}
for(i=2;i<=n;i++)
if(d[i]!=inf)
g<<d[i]<<' ';
else
g<<0<<' ';
}
int main()
{ int i, x, y, c;
f>>n>>m;
for(i=1;i<=m;i++)
{ f>>x>>y>>c;
v[x].push_back(make_pair(y,c));
}
dijsktra();
}