List methods are convenient for these types of manipulations, but a side-effect of my algorithm is a duplicate entry when a whole-number square root pops up.
List方法对于这些类型操作很方便，但我的算法有个副作用，就是出现整数平方根时，会有重复。
2
At first, with no barrier to entry, enrolment climbed, but in 1976 the city of New York, which was then in effect bankrupt, forced CUNY to impose tuition fees.
The only state to pass a bill requiring the vaccine for school entry is Virginia; it takes effect in October, after school begins, so will first apply in 2009.