public static int MinimumCost ( int cost [ ] , int n , int W ) {
  Vector < Integer > val = new Vector < Integer > ( ) ;
  Vector < Integer > wt = new Vector < Integer > ( ) ;
  int size = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( cost [ i ] != - 1 ) {
      val . add ( cost [ i ] ) ;
      wt . add ( i + 1 ) ;
      size ++ ;
    }
  }
  n = size ;
  int min_cost [ ] [ ] = new int [ n + 1 ] [ W + 1 ] ;
  for ( int i = 0 ;
  i <= W ;
  i ++ ) min_cost [ 0 ] [ i ] = Integer . MAX_VALUE ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) min_cost [ i ] [ 0 ] = 0 ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    for ( int j = 1 ;
    j <= W ;
    j ++ ) {
      if ( wt . get ( i - 1 ) > j ) min_cost [ i ] [ j ] = min_cost [ i - 1 ] [ j ] ;
      else min_cost [ i ] [ j ] = Math . min ( min_cost [ i - 1 ] [ j ] , min_cost [ i ] [ j - wt . get ( i - 1 ) ] + val . get ( i - 1 ) ) ;
    }
  }
  return ( min_cost [ n ] [ W ] == Integer . MAX_VALUE ) ? - 1 : min_cost [ n ] [ W ] ;
}

public static int MinimumCost ( int cost [ ] , int n , int W ) { Vector < Integer > val = new Vector < Integer > ( ) ; Vector < Integer > wt = new Vector < Integer > ( ) ; int size = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( cost [ i ] != - 1 ) { val . add ( cost [ i ] ) ; wt . add ( i + 1 ) ; size ++ ; } } n = size ; int min_cost [ ] [ ] = new int [ n + 1 ] [ W + 1 ] ; for ( int i = 0 ; i <= W ; i ++ ) min_cost [ 0 ] [ i ] = Integer . MAX_VALUE ; for ( int i = 1 ; i <= n ; i ++ ) min_cost [ i ] [ 0 ] = 0 ; for ( int i = 1 ; i <= n ; i ++ ) { for ( int j = 1 ; j <= W ; j ++ ) { if ( wt . get ( i - 1 ) > j ) min_cost [ i ] [ j ] = min_cost [ i - 1 ] [ j ] ; else min_cost [ i ] [ j ] = Math . min ( min_cost [ i - 1 ] [ j ] , min_cost [ i ] [ j - wt . get ( i - 1 ) ] + val . get ( i - 1 ) ) ; } } return ( min_cost [ n ] [ W ] == Integer . MAX_VALUE ) ? - 1 : min_cost [ n ] [ W ] ; }
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