static int getSingle ( int arr [ ] , int n ) {
  int ones = 0 , twos = 0 ;
  int common_bit_mask ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    twos = twos | ( ones & arr [ i ] ) ;
    ones = ones ^ arr [ i ] ;
    common_bit_mask = ~ ( ones & twos ) ;
    ones &= common_bit_mask ;
    twos &= common_bit_mask ;
  }
  return ones ;
}

static int getSingle ( int arr [ ] , int n ) { int ones = 0 , twos = 0 ; int common_bit_mask ; for ( int i = 0 ; i < n ; i ++ ) { twos = twos | ( ones & arr [ i ] ) ; ones = ones ^ arr [ i ] ; common_bit_mask = ~ ( ones & twos ) ; ones &= common_bit_mask ; twos &= common_bit_mask ; } return ones ; }
(method_declaration (modifiers) type: (integral_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)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (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 (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))))) (expression_statement (assignment_expression left: (identifier) right: (unary_expression operand: (parenthesized_expression (binary_expression left: (identifier) right: (identifier)))))) (expression_statement (assignment_expression left: (identifier) right: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (return_statement (identifier))))