static int firstNonRepeating ( int arr [ ] , int n ) {
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int j ;
    for ( j = 0 ;
    j < n ;
    j ++ ) if ( i != j && arr [ i ] == arr [ j ] ) break ;
    if ( j == n ) return arr [ i ] ;
  }
  return - 1 ;
}

static int firstNonRepeating ( int arr [ ] , int n ) { for ( int i = 0 ; i < n ; i ++ ) { int j ; for ( j = 0 ; j < n ; j ++ ) if ( i != j && arr [ i ] == arr [ j ] ) break ; if ( j == n ) return arr [ i ] ; } return - 1 ; }
(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 (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 (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier))) (for_statement init: (assignment_expression left: (identifier) right: (decimal_integer_literal)) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (identifier))))) consequence: (break_statement))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (return_statement (array_access array: (identifier) index: (identifier)))))) (return_statement (unary_expression operand: (decimal_integer_literal)))))