public static int solve ( int [ ] A , int n ) {
  int [ ] [ ] dp = new int [ 2000 ] [ 2000 ] ;
  int flag = 1 ;
  int sum = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) sum += A [ i ] ;
  for ( int i = - sum ;
  i <= sum ;
  i ++ ) {
    try {
      dp [ 0 ] [ i ] = Integer . MAX_VALUE ;
    }
    catch ( Exception e ) {
    }
  }
  dp [ 0 ] [ 0 ] = 0 ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    for ( int j = 0 ;
    j <= sum ;
    j ++ ) {
      try {
        dp [ flag ] [ j ] = Integer . MAX_VALUE ;
        if ( j - A [ i - 1 ] <= sum && j - A [ i - 1 ] >= - sum ) dp [ flag ] [ j ] = dp [ flag ^ 1 ] [ j - A [ i - 1 ] ] ;
        if ( j + A [ i - 1 ] <= sum && j + A [ i - 1 ] >= - sum && dp [ flag ^ 1 ] [ j + A [ i - 1 ] ] != Integer . MAX_VALUE ) dp [ flag ] [ j ] = Math . min ( dp [ flag ] [ j ] , dp [ flag ^ 1 ] [ j + A [ i - 1 ] ] + 1 ) ;
      }
      catch ( Exception e ) {
      }
    }
    flag = flag ^ 1 ;
  }
  for ( int i = 0 ;
  i <= sum ;
  i ++ ) {
    if ( dp [ flag ^ 1 ] [ i ] != Integer . MAX_VALUE ) return dp [ flag ^ 1 ] [ i ] ;
  }
  return n - 1 ;
}

public static int solve ( int [ ] A , int n ) { int [ ] [ ] dp = new int [ 2000 ] [ 2000 ] ; int flag = 1 ; int sum = 0 ; for ( int i = 0 ; i < n ; i ++ ) sum += A [ i ] ; for ( int i = - sum ; i <= sum ; i ++ ) { try { dp [ 0 ] [ i ] = Integer . MAX_VALUE ; } catch ( Exception e ) { } } dp [ 0 ] [ 0 ] = 0 ; for ( int i = 1 ; i <= n ; i ++ ) { for ( int j = 0 ; j <= sum ; j ++ ) { try { dp [ flag ] [ j ] = Integer . MAX_VALUE ; if ( j - A [ i - 1 ] <= sum && j - A [ i - 1 ] >= - sum ) dp [ flag ] [ j ] = dp [ flag ^ 1 ] [ j - A [ i - 1 ] ] ; if ( j + A [ i - 1 ] <= sum && j + A [ i - 1 ] >= - sum && dp [ flag ^ 1 ] [ j + A [ i - 1 ] ] != Integer . MAX_VALUE ) dp [ flag ] [ j ] = Math . min ( dp [ flag ] [ j ] , dp [ flag ^ 1 ] [ j + A [ i - 1 ] ] + 1 ) ; } catch ( Exception e ) { } } flag = flag ^ 1 ; } for ( int i = 0 ; i <= sum ; i ++ ) { if ( dp [ flag ^ 1 ] [ i ] != Integer . MAX_VALUE ) return dp [ flag ^ 1 ] [ i ] ; } return n - 1 ; }
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