static void sieve ( ) {
  spf [ 0 ] = 1 ;
  spf [ 1 ] = - 1 ;
  for ( int i = 2 ;
  i * i < MAX ;
  i ++ ) {
    if ( spf [ i ] == 0 ) {
      for ( int j = i * 2 ;
      j < MAX ;
      j += i ) {
        if ( spf [ j ] == 0 ) {
          spf [ j ] = i ;
        }
      }
    }
  }
  for ( int i = 2 ;
  i < MAX ;
  i ++ ) {
    if ( spf [ i ] != 1 ) spf [ i ] = i ;
  }
}

static void sieve ( ) { spf [ 0 ] = 1 ; spf [ 1 ] = - 1 ; for ( int i = 2 ; i * i < MAX ; i ++ ) { if ( spf [ i ] == 0 ) { for ( int j = i * 2 ; j < MAX ; j += i ) { if ( spf [ j ] == 0 ) { spf [ j ] = i ; } } } } for ( int i = 2 ; i < MAX ; i ++ ) { if ( spf [ i ] != 1 ) spf [ i ] = i ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters) body: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (decimal_integer_literal))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (unary_expression operand: (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: (binary_expression left: (identifier) right: (identifier)) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) condition: (binary_expression left: (identifier) right: (identifier)) update: (assignment_expression left: (identifier) right: (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))))))))) (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: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))))))