public static void main ( String ards [ ] ) {
  Scanner cin = new Scanner ( System . in ) ;
  int n = cin . nextInt ( ) ;
  long [ ] a = new long [ 100010 ] ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    a [ i ] = cin . nextLong ( ) ;
  }
  Arrays . sort ( a , 1 , n + 1 ) ;
  int flag = 0 ;
  long sum = 0 ;
  for ( int i = 1 ;
  i < n ;
  i ++ ) {
    if ( a [ i ] == a [ i + 1 ] ) {
      flag ++ ;
      if ( a [ i ] == a [ i - 1 ] + 1 && i > 1 ) {
        flag ++ ;
      }
    }
    sum += a [ i ] - i + 1 ;
  }
  sum += a [ n ] - n + 1 ;
  if ( flag > 1 ) {
    System . out . println ( "cslnb" ) ;
  }
  else if ( a [ 1 ] == 0 && a [ 2 ] == 0 ) {
    System . out . println ( "cslnb" ) ;
  }
  else {
    if ( sum % 2 == 0 ) {
      System . out . println ( "cslnb" ) ;
    }
    else {
      System . out . println ( "sjfnb" ) ;
    }
  }
}

public static void main ( String ards [ ] ) { Scanner cin = new Scanner ( System . in ) ; int n = cin . nextInt ( ) ; long [ ] a = new long [ 100010 ] ; for ( int i = 1 ; i <= n ; i ++ ) { a [ i ] = cin . nextLong ( ) ; } Arrays . sort ( a , 1 , n + 1 ) ; int flag = 0 ; long sum = 0 ; for ( int i = 1 ; i < n ; i ++ ) { if ( a [ i ] == a [ i + 1 ] ) { flag ++ ; if ( a [ i ] == a [ i - 1 ] + 1 && i > 1 ) { flag ++ ; } } sum += a [ i ] - i + 1 ; } sum += a [ n ] - n + 1 ; if ( flag > 1 ) { System . out . println ( " cslnb " ) ; } else if ( a [ 1 ] == 0 && a [ 2 ] == 0 ) { System . out . println ( " cslnb " ) ; } else { if ( sum % 2 == 0 ) { System . out . println ( " cslnb " ) ; } else { System . out . println ( " sjfnb " ) ; } } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) 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: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (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: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal) (binary_expression left: (identifier) right: (decimal_integer_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (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: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) consequence: (block (expression_statement (update_expression (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal))) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (expression_statement (update_expression (identifier))))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier)) right: (decimal_integer_literal)))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier)) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (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))))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) alternative: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))))))))))