static int minimumSwaps(int[] arr) {
        int swaps = 0;
        for (int i = 0; i < arr.length; i++) {
            while (arr[i] != i + 1) {
                int temp = arr[arr[i] - 1];
                arr[arr[i] - 1] = arr[i];
                arr[i] = temp;
                swaps++;
            }
        }
        return swaps;
    }