> 子集
给你一个整数数组 nums ,数组中的元素 互不相同 。返回该数组所有可能的子集(幂集)。
解集 不能 包含重复的子集。你可以按 任意顺序 返回解集。
示例 1:
输入:nums = [1,2,3] 输出:[[],[1],[2],[1,2],[3],[1,3],[2,3],[1,2,3]]
示例 2:
输入:nums = [0] 输出:[[],[0]]
AC 代码
func subsets(nums []int) [][]int {
l := list.New()
result := list.New()
for i := 0; i <= len(nums); i++ {
dfs(nums, 0, i, l, result)
}
arr := make([][]int, result.Len())
k := 0
for e := result.Front(); e != nil; e = e.Next(){
curl := e.Value.(*list.List)
arr[k] = make([]int, curl.Len())
k++
}
i := 0;
for e := result.Front(); e != nil; e = e.Next() {
//fmt.Println(e.Value.(*list.List).Front().Value)
curl := e.Value.(*list.List)
j := 0
for p := curl.Front(); p != nil; p = p.Next() {
//fmt.Println(p.Value)
arr[i][j] = p.Value.(int)
j++
}
i++;
}
return arr
}
func dfs(nums []int, start int, len int, l *list.List, result *list.List) {
if start == len {
a := list.New()
for e := l.Front(); e != nil; e = e.Next() {
fmt.Println(e.Value.(int))
a.PushBack(e.Value)
}
result.PushBack(a)
return
}
for i := start; i < len; i++ {
l.PushBack(nums[i])
dfs(nums, i+1, len, l, result)
b := l.Back()
l.Remove(b)
}
}
https://mp.weixin.qq.com/s/81TnI22hNoBbf9xKo-ZJLQ