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#include <iostream>
#include <fstream>
using namespace std;
int element(int i,int R)
{ int p=1,p1=1;
for(int k=1;k<=R-i;k++)
p=p*k;
for(int k=i+1;k<=R;k++)
p1=p1*k;
return p1/p;
}
int main()
{ ifstream fin("pascal.in");
ofstream fout("pascal.out");
int R,D,cont=0;
fin>>R>>D;
for(int i=1;i<R;i++)
if(element(i,R)%D==0)
cont++;
fout<<cont;
fin.close();
fout.close();
return 0;
}