import sys for s in sys.stdin: s = list(map(str,s)) for i in range(len(s)): s[i] = ord(s[i]) s[i] = s[i]-7 s[i] = chr(s[i]) print(''.join(s))只要把加密過的字元先轉成ASCII碼,然後把ASCII碼加上K,再轉回字元就完成了,非常簡單:D