#include<iostream>
#include<cmath>
#include<cstdlib>
using namespace std;
long long silnia(int n)
{
long long b;
b=1;
while(n>0)
{
b=n*b;
n=n-1;
}
return b;
}
int main()
{
int n,k,x;
cout<<"Podaj dwie liczby: "<<endl;
cin>>n>>k;
if(n==0||k==0)
{
cout<<"Zle liczby. Podaj liczby wieksze od 0. ";
cin>>n>>k;
}
x=n-k;
cout<<((silnia(n))/(silnia(k)*silnia(x)))<<endl;
system("pause");
return 0;
}
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