题解 | #进制转换#

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