static int sumKRepeating ( int arr [ ] , int n , int k ) {
  int sum = 0 ;
  Vector < Boolean > visited = new Vector < Boolean > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) visited . add ( false ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( visited . get ( i ) == true ) continue ;
    int count = 1 ;
    for ( int j = i + 1 ;
    j < n ;
    j ++ ) {
      if ( arr [ i ] == arr [ j ] ) {
        count ++ ;
        visited . add ( j , true ) ;
      }
    }
    if ( count == k ) sum += arr [ i ] ;
  }
  return sum ;
}

static int sumKRepeating ( int arr [ ] , int n , int k ) { int sum = 0 ; Vector < Boolean > visited = new Vector < Boolean > ( ) ; for ( int i = 0 ; i < n ; i ++ ) visited . add ( false ) ; for ( int i = 0 ; i < n ; i ++ ) { if ( visited . get ( i ) == true ) continue ; int count = 1 ; for ( int j = i + 1 ; j < n ; j ++ ) { if ( arr [ i ] == arr [ j ] ) { count ++ ; visited . add ( j , true ) ; } } if ( count == k ) sum += arr [ i ] ; } return sum ; }
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