题解 | #二进制数#

while True:
    try:
        a=int(input())
        list1=[]
        while a>0:
            list1.append(a%2)
            a//=2
        list1.reverse()
        for i in range(len(list1)):
            print(list1[i],end='')
        print()
    except EOFError:
        break