题目：

题解：

func findRadius(houses, heaters []int) (ans int) {sort.Ints(houses)sort.Ints(heaters)j := 0for _, house := range houses {dis := abs(house - heaters[j])for j+1 < len(heaters) && abs(house-heaters[j]) >= abs(house-heaters[j+1]) {j++if abs(house-heaters[j]) < dis {dis = abs(house - heaters[j])}}if dis > ans {ans = dis}}return
}func abs(x int) int {if x < 0 {return -x}return x
}