public class Main {

    public static void main(String[] args) {
        int [] a = new int[]{4,3,1,2};
        minimumSwaps(a);
    }
    static int minimumSwaps(int[] arr) {
        int swapsCount = 0;
        int arraySize = arr.length;

        int[] sortedArray = arr.clone();
        Arrays.sort(sortedArray);

        for(int i = 0; i < arraySize; i++) {
            if (sortedArray[i] != arr[i])
                swapsCount++;

            for(int j = i+1; j < arraySize; j++) {
                if (arr[j] == sortedArray[i]) {
                    int temp = arr[j];
                    arr[j] = arr[i];
                    arr[i] = temp;
                    break;
                }
            }
        }
        return swapsCount;
    }
}