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PAT甲级2014冬季1. Rational Arithmetic2. Insert or Merge3. Highest Price in Supply Chain4. Acute Stroke1. Rational ArithmeticFor two rational numbers, your task is to implement the basic arithmetics, that is, to calculate their sum, difference, product and qu

PAT甲级2015春季1. To Buy or Not to Buy2.Count PAT's3.The Largest Generation4.Cars on Campus这套题挺有意思，前三个题都非常简单，最后一题第一次做有点麻烦，不容易满分（卡时间）1. To Buy or Not to BuyEva would like to make a string of beads with her favorite colors so she went to a small shop to buy s

PAT甲级2014秋季1. Broken Keyboard2. Perfect Sequence3. Tree Traversals Again4. All Roads Lead to Rome1. Broken KeyboardOn a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not a