import sys search_dict = {'0':0, '1':1, '2':2, '3':3, '4':4, '5':5, '6':6, '7':7, '8':8, '9':9, 'A':10, 'B':11, 'C':12, 'D':13, 'E':14, 'F':15} a = list(input())[2:] a = a[::-1] # starts from ones place output = 0 for index, num in enumerate(a): unit = 16**index output += unit * search_dict[num] pri...