public static long c ( long o , long l ) {
  long ans = 1 ;
  for ( long i = 1 ;
  i <= l ;
  i ++ ) {
    ans *= o - i + 1 ;
    ans /= i ;
  }
  return ans ;
}

public static long c ( long o , long l ) { long ans = 1 ; for ( long i = 1 ; i <= l ; i ++ ) { ans *= o - i + 1 ; ans /= i ; } return ans ; }
(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))) (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: (identifier) right: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (return_statement (identifier))))