static String permutation ( int arr [ ] , int N ) {
  int [ ] hash = new int [ N + 1 ] ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    hash [ arr [ i ] ] ++ ;
  }
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    if ( hash [ i ] != 1 ) return "No" ;
  }
  return "Yes" ;
}

static String permutation ( int arr [ ] , int N ) { int [ ] hash = new int [ N + 1 ] ; for ( int i = 0 ; i < N ; i ++ ) { hash [ arr [ i ] ] ++ ; } for ( int i = 1 ; i <= N ; i ++ ) { if ( hash [ i ] != 1 ) return " No " ; } return " Yes " ; }
(method_declaration (modifiers) type: (type_identifier) 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: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (binary_expression left: (identifier) right: (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 (expression_statement (update_expression (array_access array: (identifier) index: (array_access array: (identifier) index: (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 (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (return_statement (string_literal))))) (return_statement (string_literal))))