n = int( input() )
s=''
while n==0:
    print('0')
    break
while n!=0:
    s = str(n % 2) + s
    n = n // 2
print(s)
/**************************************************************
	Problem: 1108
	User: admin
	Language: Python
	Result: Accepted
	Time:191 ms
	Memory:34244 kb
****************************************************************/