Sorting Array value's index

#include <bits/stdc++.h>
using namespace std;

int main() {
    int T, N, K, index = 0;
    cin >> T;

    for(int k=1; k<=T; k++) {
        cin >> N >> K;
        int arr[N];
        if (T > 50) {
            return false;
        } else if (K > N) {
            return false;
        } else {
            for (int i = 0; i < N; i++) {
                cin >> arr[i];
            }
        }

        for (int i = 0; i < N; i++) {
            for (int j = i; j < N; j++) {
                if (arr[i] > arr[j]) {
                    int temp = arr[i];
                    arr[i] = arr[j];
                    arr[j] = temp;
                }
            }
        }

        for (int i = 0; i < N; i++) {
            if (arr[i] == K) {
                index = i;
            }
        }

        cout << index << endl;
    }

}