摘要:
A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 1234321 is a palindromic number... 阅读全文
摘要:
One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we say that A and B is re... 阅读全文
摘要:
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 any string of N (>=5) characters, you are asked to form the characters into the shape of U. For example, "helloworld" can be printed as:hdellrlo... 阅读全文