public static long search ( long n , int k ) {
  long start = 1 ;
  long end = n ;
  long mid = ( start + end ) / 2 ;
  while ( start <= end ) {
    if ( fun ( mid , k ) < n ) {
      start = mid + 1 ;
    }
    else {
      end = mid - 1 ;
    }
    mid = ( start + end ) / 2 ;
  }
  return start ;
}

public static long search ( long n , int k ) { long start = 1 ; long end = n ; long mid = ( start + end ) / 2 ; while ( start <= end ) { if ( fun ( mid , k ) < n ) { start = mid + 1 ; } else { end = mid - 1 ; } mid = ( start + end ) / 2 ; } return start ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (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: (identifier))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier))) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))))) (return_statement (identifier))))