Alex loves to collect coins. He has been doing so since his childhood. He has a total of \(N\) different types of coins, numbered from \(0\) to \(N-1\). The \(i^{th}\) type has \(A[i]\) coins. Since, Alex is free right now, he wishes to keep these coins in order but in a specific way.

Initially no coins are in their place.

In one move, he can keep at most \(K[i]\) coins of the \(i^{th}\) type back in their place. Help him in finding the minimum number of moves it will take to re-order these coins.

Input Format:

• The first line of input contains a single integer \(T\), which denotes the number of test cases.
• The first line of each test case contains an integer \(N\), denoting the number of types of coins.
• The second line of each test case contains \(N\) space-separated integers, where the \(i^{th}\) integer denotes the value of \(A[i]\).
• The third line of each test case contains \(N\) space-separated integers, where the \(i^{th}\) integer denotes the value of \(K[i]\).

Output Format: For each test case, print an integer that denotes the minimum number of moves Alex will take to re-order coins.

Constraints: