static int find_sum ( int n , int k ) {
  int total_sum = ( n * ( n + 1 ) ) / 2 ;
  int power = k ;
  while ( power <= n ) {
    total_sum -= power ;
    power *= k ;
  }
  return total_sum ;
}

static int find_sum ( int n , int k ) { int total_sum = ( n * ( n + 1 ) ) / 2 ; int power = k ; while ( power <= n ) { total_sum -= power ; power *= k ; } return total_sum ; }
(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: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) body: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (return_statement (identifier))))