function IsBalanced_Solution(pRoot)
{
    // write code here
    if(TreeDepth(pRoot)==-1){
        return false
    }else{
        return true
    }
}
function TreeDepth(pRoot){
    if(!pRoot) return 0
    let left = TreeDepth(pRoot.left)
    if(left == -1) return -1
    let right = TreeDepth(pRoot.right)
    if(right ==- 1) return -1
    return Math.abs(left-right)>1?-1:Math.max(left,right)+1
}