进制转换

def data(inp):
    lenth=len(inp)
    sum1=0
    for i in range(lenth):
        if inp[i].isupper():
            num=list1.index(inp[i].lower())
            sum1+=num*16**(lenth-1-i)
        elif inp[i].islower():
            num=list1.index(inp[i])
            sum1+=num*16**(lenth-1-i)
        else:
            num=list1.index(inp[i])
            sum1+=num*16**(lenth-1-i)
    return sum1

while True:
    try:
        inp=input().strip().lstrip('0x')
        list1=['0','1','2','3','4','5','6',
               '7','8','9','a','b','c','d','e','f']
        print(data(inp))
    except:
        break

while True:
    try:
        print(int(input(),16))
    except:
        break

try:
    while 1:
        print int(raw_input(), 16)
except:
    pass