public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int t = sc . nextInt ( ) ;
  List < Integer > list = new ArrayList < > ( ) ;
  int first_min_index = 0 ;
  int last_min_index = 0 ;
  int min = Integer . MAX_VALUE ;
  for ( int i = 0 ;
  i < t ;
  i ++ ) {
    int toAdd = sc . nextInt ( ) ;
    if ( toAdd == min ) {
      min = toAdd ;
      if ( list . get ( i - 1 ) > min ) {
        lastBefore = i - 1 ;
      }
      last_min_index = i ;
    }
    else if ( toAdd < min ) {
      min = toAdd ;
      lastBefore = i - 1 ;
      first_min_index = i ;
      last_min_index = i ;
    }
    list . add ( toAdd ) ;
  }
  if ( canBeSorted ( list , first_min_index , last_min_index ) ) {
    if ( last_min_index != 0 ) {
      if ( last_min_index == list . size ( ) - 1 ) {
        if ( same ( list ) ) System . out . println ( 0 ) ;
        else System . out . println ( list . size ( ) - lastBefore - 1 ) ;
      }
      else {
        System . out . println ( list . size ( ) - first_min_index ) ;
      }
    }
    else {
      System . out . println ( 0 ) ;
    }
  }
  else {
    System . out . println ( - 1 ) ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int t = sc . nextInt ( ) ; List < Integer > list = new ArrayList < > ( ) ; int first_min_index = 0 ; int last_min_index = 0 ; int min = Integer . MAX_VALUE ; for ( int i = 0 ; i < t ; i ++ ) { int toAdd = sc . nextInt ( ) ; if ( toAdd == min ) { min = toAdd ; if ( list . get ( i - 1 ) > min ) { lastBefore = i - 1 ; } last_min_index = i ; } else if ( toAdd < min ) { min = toAdd ; lastBefore = i - 1 ; first_min_index = i ; last_min_index = i ; } list . add ( toAdd ) ; } if ( canBeSorted ( list , first_min_index , last_min_index ) ) { if ( last_min_index != 0 ) { if ( last_min_index == list . size ( ) - 1 ) { if ( same ( list ) ) System . out . println ( 0 ) ; else System . out . println ( list . size ( ) - lastBefore - 1 ) ; } else { System . out . println ( list . size ( ) - first_min_index ) ; } } else { System . out . println ( 0 ) ; } } else { System . out . println ( - 1 ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (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 (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (expression_statement (assignment_expression left: (identifier) right: (identifier)))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (identifier)))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) (if_statement condition: (parenthesized_expression (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier) (identifier)))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (decimal_integer_literal)))) consequence: (block (if_statement condition: (parenthesized_expression (method_invocation name: (identifier) arguments: (argument_list (identifier)))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (decimal_integer_literal)))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier)) right: (decimal_integer_literal))))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier)))))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (decimal_integer_literal))))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (unary_expression operand: (decimal_integer_literal)))))))))