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To store English words, one method is to use linked lists and store a word letter by letter. To save some space, we may let the words share the same s 阅读全文
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Given a constant K and a singly linked list L, you are supposed to reverse the links of every K elements on L. For example, given L being 1→2→3→4→5→6, 阅读全文
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Mice and Rice is the name of a programming contest in which each programmer must write a piece of code to control the movements of a mouse in a given 阅读全文
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Given a stack which can keep M numbers at most. Push N numbers in the order of 1, 2, 3, ..., N and pop randomly. You are supposed to tell if a given s 阅读全文
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Calculate a + b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are less t 阅读全文
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本题要求实现一种数字加密方法。首先固定一个加密用正整数A，对任一正整数B，将其每1位数字与A的对应位置上的数字进行以下运算：对奇数位，对应位的数字相加后对13取余——这里用J代表10、Q代表11、K代表12；对偶数位，用B的数字减去A的数字，若结果为负数，则再加10。这里令个位为第1位。 输入格式： 阅读全文