code.ashish.me

Atom feed

Recently added: 02 Count Of Subset Sum, 416 Partition Equal Subset Sum, 01 Subset Sum, 518 Coin Change 2, 983 Minimum Cost For Tickets

113 Path Sum 2

/**
 *
 * Ashish Patel
 * e: ashishsushilPatel@gmail.com
 * w: https://ashish.me
 *
 */

function TreeNode(val) {
  this.val = val
  this.left = this.right = null
}

const pathSum2 = (root, targetSum) => {
  const result = []
  const traverse = (root, sum, path) => {
    if (!root) {
      return 0
    }
    if (!root.left && !root.right) {
      if (targetSum === sum + root.val) {
        result.push([...path, root.val])
        return
      }
    }
    traverse(root.left, sum + root.val, [...path, root.val])
    traverse(root.right, sum + root.val, [...path, root.val])
  }
  traverse(root, 0, [])
  return result
}

test('pathSum2', () => {
  const t1 = new TreeNode(5)
  t1.left = new TreeNode(4)
  t1.right = new TreeNode(8)
  t1.left.left = new TreeNode(11)
  t1.left.left.left = new TreeNode(7)
  t1.left.left.right = new TreeNode(2)
  t1.right.left = new TreeNode(13)
  t1.right.right = new TreeNode(4)
  t1.right.right.left = new TreeNode(5)
  t1.right.right.right = new TreeNode(1)
  expect(pathSum2(t1, 22)).toEqual([
    [5, 4, 11, 2],
    [5, 8, 4, 5],
  ])
})

Created 2021-01-30T23:10:21+05:18 · Edit