111-minimum-depth-of-binary-tree

111 Minimum Depth Of Binary Tree

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

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

function minimumDepthOfBinaryTree(value, minDepth = 1) {
  if(!value) return 0
  if(!value.left && !value.right) return minDepth
  if(value.left && value.right) return Math.min(minimumDepthOfBinaryTree(value.left, minDepth + 1) , minimumDepthOfBinaryTree(value.right, minDepth + 1))
  if(!value.left) return minimumDepthOfBinaryTree(value.right, minDepth + 1)
  if(!value.right) return minimumDepthOfBinaryTree(value.left, minDepth + 1)
}

test('minimum Depth Of Binary Tree', () => {
  const t1 = new TreeNode(3)
  t1.left = new TreeNode(9)
  t1.right = new TreeNode(20)
  t1.right.left = new TreeNode(15)
  t1.right.right = new TreeNode(7)

  const t2 = new TreeNode(1)
  t2.left = new TreeNode(2)

  expect(minimumDepthOfBinaryTree(t1)).toEqual(2)
  expect(minimumDepthOfBinaryTree(t2)).toEqual(2)
})