2진수

n = int(input())
a=list()
summm=0
for i in range(100):
    sum=0
    summ=n//(2**i)
    sum=summ%2
    a.append(sum)
for j in range(100):
    summm=summm+a[j-1]*(10**(j-1))
print(int(summm))