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

摘要： A graph which is connected and acyclic can be considered a tree. The height of the tree depends on the selected root. Now you are supposed to find the 阅读全文

摘要： Suppose a bank has K windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. All the c 阅读全文

摘要： A long-distance telephone company charges its customers by the following rules: Making a long-distance call costs a certain amount per minute, dependi 阅读全文

摘要： Given an increasing sequence S of N integers, the median is the number at the middle position. For example, the median of S1={11, 12, 13, 14} is 12, a 阅读全文

摘要： A numeric sequence of ai is ordered if a1 < a2 < ... < aN. Let the subsequence of the given numeric sequence ( a1, a2, ..., aN) be any sequence ( ai1, 阅读全文

摘要： You're given a string of lower-case Latin letters. Your task is to find the length of its longest substring that can be met in the string at least twi 阅读全文

摘要： Summer is coming! It's time for Iahub and Iahubina to work out, as they both want to look hot at the beach. The gym where they go is a matrix a with n 阅读全文

摘要： Little John is playing very funny game with his younger brother. There is one big box filled with M&Ms of different colors. At first John has to eat s 阅读全文

摘要： Programming Ability Test (PAT) is organized by the College of Computer Science and Technology of Zhejiang University. Each test is supposed to run sim 阅读全文