static int nCr ( int n , int r ) {
  int ans = 1 ;
  for ( int i = 1 ;
  i <= r ;
  i += 1 ) {
    ans *= ( n - r + i ) ;
    ans /= i ;
  }
  return ans ;
}

static int nCr ( int n , int r ) { int ans = 1 ; for ( int i = 1 ; i <= r ; i += 1 ) { ans *= ( n - r + i ) ; 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: (assignment_expression left: (identifier) right: (decimal_integer_literal)) body: (block (expression_statement (assignment_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier))))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (return_statement (identifier))))