题目1：中国有句俗语叫“三天打鱼两天晒网”。某人从1990年1月1日起开始“三天打鱼两天晒网”，问这个人在以后的某一天中是“打鱼”还是“晒网”？

题目2：有1、2、3、4个数字，能组成多少个互不相同且无重复数字的三位数？都是多少

题目3：输入两个正整数m和n，求其最大公约数和最小公倍数-Topic 1: There is a saying called " three days of fits and starts. Someone " fits and starts network from January 1,1990,and asked in a"　fishing " or"　drying nets? Topic 2: 1, 2, 3, 4 numbers can be composed of a number of three-digit different from each other and no duplication of digital? Are how many? Topic 3: Enter two positive integers m and n, find the greatest common divisor and least common multiple.