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#include <iostream>
using namespace std;
int jiecheng(int n);
int digui(int n, int r);
int main()
{
int n,r,c1,c2;
cin>>n>>r;
c1 = jiecheng(n)/(jiecheng(r)*jiecheng(n-r));
c2 = digui(n,r);
cout<<c1<<","<<c1<<endl;
return 0;
}
int jiecheng(int n)
{
int result = 1;
for(int i=2;i<=n;++i)
result = result*i;
return result;
}
int digui(int n, int r)
{
if(r=1)
{
return n;
}
else
{
return digui(n,r-1)*(n-r+1)/r;
}
}