Remove Bad elements Codechef Solution

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Remove Bad elements Codechef Solution

Remove Bad elements Codechef Solution

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Problem

Chef has an array A of length N.

In one operation, Chef can remove any one element from the array.

Determine the minimum number of operations required to make all the elements same.

Input Format

  • The first line of input will contain a single integer T, denoting the number of test cases.
  • Each test case consists of multiple lines of input.
    • The first line of each test case contains a single integer N —the length of Array A.
    • Next line contains N space-separated integers A_1, A_2, A_3, \dots, A_N – denoting the array A.

Output Format

For each test case, output the minimum number of operations required to make all the elements same.

Constraints

  • 1 \leq T \leq 4000
  • 1 \leq N \leq 10^5
  • 1 \leq A_i \leq N
  • Sum of N over all test cases do not exceed 3 \cdot 10^5

Sample 1:

Input

Output

4
3
3 3 3
6
1 3 2 1 2 2
4
1 2 1 2
5
1 3 2 4 5
0
3
2
4

Explanation:

Test case 1: All the elements are already same. Thus we need to perform zero operations.

Test case 2: We remove the elements A_1, A_2, and A_4 using three operations. The array becomes [2, 2, 2] where all elements are same.

Test case 3: We remove the elements A_1 and A_3 using two operations. The array becomes [2, 2] where all elements are same.

Test case 4: We remove the elements A_1, A_2, A_3, and A_4 using four operations. The array becomes [5].

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SOLUTION

Remove Bad elements Codechef Solution

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