while True:
    try:
        str = input()
        str1 = list(str)
        index = 0
        for i in range(0,len(str)):
            if str[i] =='1':
                index = i
                break
        len1 = 8-index
        sum = 0
        for j in range(7,7-len1,-1):
            sum = sum + pow(2,7-j) * int(str[j])
        print(sum)

    except:
        break