You are given an array of $n$ positive integers $a_1,a_2,\ldots,a_n$.

In one operation you do the following:

1. Choose any integer $x$.
2. For all $i$ such that $a_i = x$, do $a_i := 0$ (assign $0$ to $a_i$).

Find the minimum number of operations required to sort the array in non-decreasing order.

Input

Each test contains multiple test cases. The first line contains the number of test cases $t$ ($1 \le t \le 10^4$). Description of the test cases follows.

The first line of each test case contains a single integer $n$ ($1 \le n \le 10^5$).

The second line of each test case contains $n$ positive integers $a_1,a_2,\ldots,a_n$ ($1 \le a_i \le n$).

It is guaranteed that the sum of $n$ over all test cases does not exceed $10^5$.

Output

For each test case print one integer — the minimum number of operations required to sort the array in non-decreasing order.

见题面 Input 部分

见题面 Output 部分

In the first test case, you can choose $x = 3$ for the operation, the resulting array is $[0, 0, 2]$.

In the second test case, you can choose $x = 1$ for the first operation and $x = 3$ for the second operation, the resulting array is $[0, 0, 0, 0]$.