class TreeNode {
    constructor(val) {
        this.val = val;
        this.left = null;
        this.right = null;
    }
}   
  
function canReachLeaf(root) {
    if (root == null || root.val == 0) {
        return false;
    } 
    if (root.left == null && root.right == null) {
        return true;
    }
    if (canReachLeaf(root.left)) {
        return true;
    }
    if (canReachLeaf(root.right)) {
        return true;
    }
    return false;
}
 
function leafPath(root, path) {
    if (root == null || root.val == 0) {
        return false;
    }
    path.push(root.val);
 
    if (root.left == null && root.right == null) {
        return true;
    }
    if (leafPath(root.left, path)) {
        return true;
    }
    if (leafPath(root.right, path)) {
        return true;
    }
    path.remove(path.size() - 1);
    return false;
}```