All files / leetCode 0078.ts

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
2x
2x
 
2x
18x
10x
10x
 
 
8x
8x
 
 
8x
8x
 
 
2x
 
2x
 
 
export default function subsets(nums: number[]): number[][] {
  const stack: number[] = []
  const ans: number[][] = []
 
  const dfs = (cur: number, nums: number[]) => {
    if (cur === nums.length) {
      ans.push(stack.slice())
      return
    }
 
    stack.push(nums[cur])
    dfs(cur + 1, nums)
 
    // Backtracking
    stack.pop()
    dfs(cur + 1, nums)
  }
 
  dfs(0, nums)
 
  return ans
}