题解 | 进制转换

import sys

for line in sys.stdin:
    a = line.split()
    #print(a[2:])
    af_value="".join(a)[2:]
    x_value=0
    A,B,C,D,E,F=10,11,12,13,14,15
    def trans(s):
        if s=="A": return 10
        elif s=="B": return 11
        elif s=="C": return 12
        elif s=="D": return 13
        elif s=="E": return 14
        elif s=="F": return 15
        else: return int(s)
    for i in range(len(af_value)):
        x_value=x_value+16**(len(af_value)-i-1)*trans(af_value[i])
    print(x_value)
#str=input()[2:]
#print(str)