x = int(input())
n = ''
l = 0
if x == 0:
    print(0)
else:
    while x > 0:
        y = str(x%2)
        z = int(x%2)
        n = y + n
        x = int(x-z)
        x = int(x/2)
        l = 1
if l == 1:
    print(n)