摘要： 描述 Given two integer sets A and B sorted descendingly, you are asked to output the element count of A∩B. 输入 Standard input will contain multiple test cases. The first line of the input is a single integrate T (1 <= T <= 50) which is the number of test cases. then T consecutive test cases followed. In each test case, there has four lines. The first line contains the element count N(1<=N<=100000) for the first set. The second line contains N integers in the first set. The third lin 阅读全文