while True: try: s = input()[2:] dicts = {'A':10, 'B':11, 'C':12, 'D':13, 'E':14, 'F':15, '0':0, '1':1, '2':2, '3':3, '4':4, '5':5, '6':6, '7':7, '8':8, '9':9 } lens = len(s) n = 1 sum = 0 for i in s: sum += dicts[i]*16**(lens -n) n += 1 print(sum) except: break #利用字典的思路，输入的是字符串，每一个字符代表一个数字，然后根据16进制...
