static void Count_pairs ( int a [ ] , int n ) {
  int count = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( isPowerOfTwo ( a [ i ] ) ) count ++ ;
  }
  int ans = ( count * ( count - 1 ) ) / 2 ;
  System . out . println ( ans ) ;
}

static void Count_pairs ( int a [ ] , int n ) { int count = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( isPowerOfTwo ( a [ i ] ) ) count ++ ; } int ans = ( count * ( count - 1 ) ) / 2 ; System . out . println ( ans ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (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 (if_statement condition: (parenthesized_expression (method_invocation name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))) consequence: (expression_statement (update_expression (identifier)))))) (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)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))