#include <stdio.h>

long factorial(int);
long find_ncr(int, int);
long find_npr(int, int);

int main()
{
    int n, r;
    long ncr, npr;
    printf("Enter the value of n and r\n");
    scanf("%d%d",&n,&r);
    ncr = find_ncr(n, r);
    npr = find_npr(n, r);
    printf("%dC%d = %ld\n", n, r, ncr);
    printf("%dP%d = %ld\n", n, r, npr);
    return 0;
}

long find_ncr(int n, int r)
{
    long result;
    result = factorial(n)/(factorial(r)*factorial(n-r));
    return result;
}

long find_npr(int n, int r)
{
    long result;
    result = factorial(n)/factorial(n-r);
    return result;
}

long factorial(int n)
{
    int c;
    long result = 1;
    for (c = 1; c <= n; c++)
        result = result*c;
    return result;
}