Pagini recente » Cod sursa (job #316140) | Istoria paginii runda/runda_ezoterica_1/clasament | Cod sursa (job #863073) | Cod sursa (job #500165) | Cod sursa (job #3296694)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
#define NMAX 50001
int n,m,x,y,z;
int dist_min[NMAX];
bool vizitat[NMAX];
class cmp
{
public:
bool operator ()(int a, int b)
{
return dist_min[a]>dist_min[b];
}
};
vector<pair<int,int>> v[NMAX];
priority_queue<int,vector<int>,cmp> q;
void dijkstra(int m)
{
for(int i=1; i<=n; i++)
{
dist_min[i]=100000001;
}
q.push(m);
vizitat[m]=1;
dist_min[m]=0;
while(!q.empty())
{
int x=q.top();
q.pop();
vizitat[x]=0;
for(auto u:v[x])
{
if(dist_min[x]+u.second<dist_min[u.first])
{
dist_min[u.first]=dist_min[x]+u.second;
if(!vizitat[u.first])
{
vizitat[u.first]=1;
q.push(u.first);
}
}
}
}
}
int main()
{
fin>>n>>m;
for(int i=1; i<=m; i++)
{
fin>>x>>y>>z;
v[x].push_back({y,z});
}
dijkstra(1);
for(int i=2; i<=n; i++)
{
if(dist_min[i]!=100000001)
{
fout<<dist_min[i]<<" ";
}
else
{
fout<<0<<" ";
}
}
return 0;
}