public static void ans ( int [ ] arr , int sum , int n ) {
  if ( sum % n != 0 ) {
    System . out . println ( "Unrecoverable configuration." ) ;
    return ;
  }
  int equal = sum / n ;
  int inc = 0 , dec = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( arr [ i ] > equal ) inc ++ ;
    else if ( arr [ i ] < equal ) dec ++ ;
  }
  if ( inc == 0 && dec == 0 ) {
    System . out . println ( "Exemplary pages." ) ;
    return ;
  }
  else if ( inc == 1 && dec == 1 ) {
    int a = 0 , b = 0 , ia = 0 , ib = 0 ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      if ( arr [ i ] > equal ) {
        a = arr [ i ] - equal ;
        ia = i ;
      }
      else if ( arr [ i ] < equal ) {
        b = equal - arr [ i ] ;
        ib = i ;
      }
    }
    if ( a == b ) {
      System . out . println ( a + " ml. from cup #" + ( ib + 1 ) + " to cup #" + ( ia + 1 ) + "." ) ;
      return ;
    }
    else {
      System . out . println ( "Unrecoverable configuration." ) ;
      return ;
    }
  }
  else {
    System . out . println ( "Unrecoverable configuration." ) ;
    return ;
  }
}

public static void ans ( int [ ] arr , int sum , int n ) { if ( sum % n != 0 ) { System . out . println ( " Unrecoverable ▁ configuration . " ) ; return ; } int equal = sum / n ; int inc = 0 , dec = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( arr [ i ] > equal ) inc ++ ; else if ( arr [ i ] < equal ) dec ++ ; } if ( inc == 0 && dec == 0 ) { System . out . println ( " Exemplary ▁ pages . " ) ; return ; } else if ( inc == 1 && dec == 1 ) { int a = 0 , b = 0 , ia = 0 , ib = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( arr [ i ] > equal ) { a = arr [ i ] - equal ; ia = i ; } else if ( arr [ i ] < equal ) { b = equal - arr [ i ] ; ib = i ; } } if ( a == b ) { System . out . println ( a + " ▁ ml . ▁ from ▁ cup ▁ # " + ( ib + 1 ) + " ▁ to ▁ cup ▁ # " + ( ia + 1 ) + " . " ) ; return ; } else { System . out . println ( " Unrecoverable ▁ configuration . " ) ; return ; } } else { System . out . println ( " Unrecoverable ▁ configuration . " ) ; return ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (return_statement))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: 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(array_access array: (identifier) index: (identifier))))) (expression_statement (assignment_expression left: (identifier) right: (identifier)))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (string_literal)) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (string_literal))))) (return_statement)) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: 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