<awangdev>1053. Previous Permutation With One Swap_1.java
private void swap(int[] arr, int x, int y) {

        int temp = arr[x];
        arr[x] = arr[y];
        arr[y] = temp;
    }
private void var_0 ( int [ ] var_1 , int var_2 , int var_3 ) {
  int var_4 = var_1 [ var_2 ] ;
  var_1 [ var_2 ] = var_1 [ var_3 ] ;
  var_1 [ var_3 ] = var_4 ;
}
