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P1217 Prime Palindromes P1217 Prime Palindromes P1217 Prime Palindromes 题目描述 因为151既是一个质数又是一个回文数(从左到右和从右到左是看一样的),所以 151 是回文质数。 写一个程序来找出范围[a,b](5 <= a < 阅读全文
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D. String D. String You are given a string s. Each pair of numbers l and r that fulfill the condition 1 ≤ l ≤ r ≤ |s|, correspond to a substring of th 阅读全文
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Secretary Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 1655 Accepted: 671 Description The basic condition of success of a political part 阅读全文