static int first ( int arr [ ] , int low , int high ) {
  if ( high >= low ) {
    int mid = low + ( high - low ) / 2 ;
    if ( ( mid == 0 || arr [ mid - 1 ] == 0 ) && arr [ mid ] == 1 ) return mid ;
    else if ( arr [ mid ] == 0 ) return first ( arr , ( mid + 1 ) , high ) ;
    else return first ( arr , low , ( mid - 1 ) ) ;
  }
  return - 1 ;
}

static int first ( int arr [ ] , int low , int high ) { if ( high >= low ) { int mid = low + ( high - low ) / 2 ; if ( ( mid == 0 || arr [ mid - 1 ] == 0 ) && arr [ mid ] == 1 ) return mid ; else if ( arr [ mid ] == 0 ) return first ( arr , ( mid + 1 ) , high ) ; else return first ( arr , low , ( mid - 1 ) ) ; } 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)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal)))) right: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal)))) consequence: (return_statement (identifier)) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (return_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) (identifier)))) alternative: (return_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier) (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))))))))) (return_statement (unary_expression operand: (decimal_integer_literal)))))