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Cod sursa(job #778660)
#include<fstream>
#include<cmath>
#include<algorithm>
using namespace std;
int jt;
long long n,i;
long long v[3001];
int k,sqrtn,nrdiv,j,u,t;
int m[3001][3001];
ifstream f("desc.in");
ofstream g("desc.out");
int main()
{f>>n>>k;
sqrtn=(int)sqrt((double)n);
for(i=2; i<sqrtn; i++)
{if(n%i==0)
{v[nrdiv++]=i;
v[nrdiv++]=n/i;}
}
if(n%sqrtn==0)
{v[nrdiv++]=sqrtn;
if(int(n/sqrtn)!=sqrtn)
v[nrdiv++]=n/sqrtn;
}
v[nrdiv++]=n;
sort(v,v+nrdiv);
m[0][0]=1;
for(u=1; u<nrdiv; u++)
{m[u][u]=1;
for(j=u-1; j>=0; j--)
{m[u][j]=m[u][j+1];
if(v[u]%v[j]==0)
{t=0;
while(v[t]<v[u]/v[j]) t++;
m[u][j]+=m[t][j];}
}
}
g<<m[nrdiv-1][0]<<endl;
u=nrdiv-1;
j=0;
while(n>1)
{
if(m[u][j]-m[u][j+1]<k)
{k=k-m[u][j]+m[u][j+1];
j++;}
else
{g<<v[j]<<" ";
n=n/v[j];
if(n!=1)
while(v[u]>n) u--;
}
}
f.close();
g.close();
}