<gouthampradhan>backtracking_PermutationsII_1.java
private void swap(int[] a, int i, int j) {
    int tmp = a[i];
    a[i] = a[j];
    a[j] = tmp;
  }
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 ;
}
