This is the hard version of the problem. The difference is the constraint on the sum of lengths of strings and the number of test cases. You can make hacks only if you solve all versions of this task. You are given a string ss, consisting of lowercas…
一个b站上的朋友问我,怎么返回五位数的回文数的个数. 我首先百度回文数的概念,就是正读和倒读都一样的数字,例如:10001,99899 等等 数字的位数拆分一头雾水,思来想去,用字符串的方法完美解决! count = 0 for i in range(10000, 100000): a = str(i) if a[0] == a[-1] and a[1] == a[-2]: count +=1 print(i) print(count)…
HDU 3294 Problem Description One day, sailormoon girls are so delighted that they intend to research about palindromic strings. Operation contains two steps:First step: girls will write a long string (only contains lower case) on the paper. For exa…