Lanran has a binary tree with \(n\) nodes, she does not know whether this tree is a complete binary tree or not. She turns to you for help. We guarantee that the input is a binary tree.

Submit: 2325 Solved: 450

[Submit][Status][Web Board]

Lanran has a binary tree with \(n\) nodes, she does not know whether this tree is a complete binary tree or not. She turns to you for help. We guarantee that the input is a binary tree.

The first line will be an integer \(T\), which is the number of the test cases.\((1 \le T \le 14)\) For each test case, the first line will be an integer \(n\).\((1\le n\le 150000)\)Then followed by \(n\) lines, each line will be two integers \(x\) and \(y\), the i-th line means the left child of node i is \(x\), the right child of node i is \(y\). If node i has no left child, then \(x\) will be 0. If node i has no right child, then \(y\) will be 0.

For each test output Yes or No in one line.

```
1
5
2 3
4 0
5 0
0 0
0 0
```

`No`