#include<stdio.h>
int main()
{
int m, n = 0;
scanf_s("%d%d", &n, &m);
int a = 1;
int b = 1;
int c = 1;
int i = 0;
for (i = n;i >= n - m + 1;i--)
a *= i;
for (i = 1;i <= m;i++)
b *= i;
c = a / b;
printf("C(%d,%d)=%d\n", n, m, c);
printf("A(%d,%d)=%d\n", n, m, a);
return 0;
}
