def sequence(n):
    if n==0:
        return 1
    else:
        return sequence(int(n/3))+sequence(int(n/5))
    
def com(a,b):
    if b==0 or a==b:
        return 1
    elif b==1:
        return a
    return com(a-1,b-1)+com(a-1,b)



N=int(input())
i=0
j=0
total=0


while N>1:
    N=N/5
    i+=1
while j<=i:
    total+=com(i,j)*sequence(int(N*((5/3)**j)))
    j+=1

    
print('%d'%total)