static int minimumSwaps(int[] arr) {
        int swaps = 0;
        for(int i = 0; i < arr.length; i++) {
            int minimum = Integer.MAX_VALUE;
            int minimumIndex = -1;
            for(int j = i; j < arr.length; j++) {
                if (arr[j] < minimum) { 
                    minimum = arr[j];
                    minimumIndex = j; 
                }
            }
            if (arr[i] != minimum) {
                int temp = arr[i];
                arr[i] = arr[minimumIndex];
                arr[minimumIndex] = temp;
                swaps += 1;
            }
        }
        return swaps;
    }