public static int getMaxSum ( int a [ ] , int b [ ] , int n , int k ) {
  Arrays . sort ( a ) ;
  Arrays . sort ( b ) ;
  int count = 0 ;
  int curr = n - 1 ;
  int sum = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( a [ i ] < b [ curr ] && count < k ) {
      sum += b [ curr ] ;
      count ++ ;
      curr -- ;
    }
    else {
      sum += a [ i ] ;
    }
  }
  return sum ;
}

public static int getMaxSum ( int a [ ] , int b [ ] , int n , int k ) { Arrays . sort ( a ) ; Arrays . sort ( b ) ; int count = 0 ; int curr = n - 1 ; int sum = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( a [ i ] < b [ curr ] && count < k ) { sum += b [ curr ] ; count ++ ; curr -- ; } else { sum += a [ i ] ; } } return sum ; }
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