叶子落满了秋

摘要： 一、题面 You want to form a target string of lowercase letters. At the beginning, your sequence is target.length '?' marks. You also have a stamp of lower 阅读全文

摘要： 一、题面 一、题面 在给定的二维二进制数组 A 中，存在两座岛。（岛是由四面相连的 1 形成的一个最大组。） 现在，我们可以将 0 变为 1，以使两座岛连接起来，变成一座岛。 返回必须翻转的 0 的最小数目。（可以保证答案至少是 1。） 示例 1： 输入：[[0,1],[1,0]] 输出：1 示例 阅读全文

摘要： 题目： A single positive integer i is given. Write a program to find the digit located in the position i in the sequence of number groups S1S2...Sk. Each 阅读全文

摘要： 题目： Transmitting and memorizing information is a task that requires different coding systems for the best use of the available space. A well known sys 阅读全文

摘要： 题目： "Well, it seems the first problem is too easy. I will let you know how foolish you are later." feng5166 says. "The second problem is, given an pos 阅读全文

摘要： 题目： 假设有x1个字母A， x2个字母B,..... x26个字母Z，同时假设字母A的价值为1，字母B的价值为2,..... 字母Z的价值为26。那么，对于给定的字母，可以找到多少价值<=50的单词呢？单词的价值就是组成一个单词的所有字母的价值之和，比如，单词ACM的价值是1+3+14=18，单词 阅读全文

摘要： 题目： Longge is good at mathematics and he likes to think about hard mathematical problems which will be solved by some graceful algorithms. Now a probl 阅读全文

摘要： 一、题目 Chinese people think of '8' as the lucky digit. Bob also likes digit '8'. Moreover, Bob has his own lucky number L. Now he wants to construct his 阅读全文

摘要： 一、题目 A lattice point (x, y) in the first quadrant (x and y are integers greater than or equal to 0), other than the origin, is visible from the origin 阅读全文

摘要： 一、题目 The Farey Sequence Fn for any integer n with n >= 2 is the set of irreducible rational numbers a/b with 0 < a < b <= n and gcd(a,b) = 1 arranged 阅读全文