public static void main ( String [ ] args ) {
  Scanner scn = new Scanner ( System . in ) ;
  int n = scn . nextInt ( ) ;
  int m = scn . nextInt ( ) ;
  int r = scn . nextInt ( ) ;
  int count = 0 ;
  int [ ] a = new int [ n ] ;
  int [ ] b = new int [ m ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) a [ i ] = scn . nextInt ( ) ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) b [ i ] = scn . nextInt ( ) ;
  int mina = a [ 0 ] ;
  int maxb = b [ 0 ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) mina = Math . min ( mina , a [ i ] ) ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) maxb = Math . max ( maxb , b [ i ] ) ;
  if ( maxb < mina ) System . out . println ( r ) ;
  else System . out . println ( maxb * ( r / mina ) + r % mina ) ;
}

public static void main ( String [ ] args ) { Scanner scn = new Scanner ( System . in ) ; int n = scn . nextInt ( ) ; int m = scn . nextInt ( ) ; int r = scn . nextInt ( ) ; int count = 0 ; int [ ] a = new int [ n ] ; int [ ] b = new int [ m ] ; for ( int i = 0 ; i < n ; i ++ ) a [ i ] = scn . nextInt ( ) ; for ( int i = 0 ; i < m ; i ++ ) b [ i ] = scn . nextInt ( ) ; int mina = a [ 0 ] ; int maxb = b [ 0 ] ; for ( int i = 0 ; i < n ; i ++ ) mina = Math . min ( mina , a [ i ] ) ; for ( int i = 0 ; i < m ; i ++ ) maxb = Math . max ( maxb , b [ i ] ) ; if ( maxb < mina ) System . out . println ( r ) ; else System . out . println ( maxb * ( r / mina ) + r % mina ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (array_access array: (identifier) index: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (array_access array: (identifier) index: (decimal_integer_literal)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (array_access array: (identifier) index: (identifier))))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (array_access array: (identifier) index: (identifier))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier)))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier)))) right: (binary_expression left: (identifier) right: (identifier)))))))))