public static void main ( String [ ] args ) throws IOException {
  BufferedReader stdin = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  int n = Integer . parseInt ( stdin . readLine ( ) . replaceAll ( " " , "" ) ) ;
  int r = ( int ) Math . floor ( Math . sqrt ( n ) ) ;
  String ans = n == r * r ? "Yes" : "No" ;
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) throws IOException { BufferedReader stdin = new BufferedReader ( new InputStreamReader ( System . in ) ) ; int n = Integer . parseInt ( stdin . readLine ( ) . replaceAll ( " ▁ " , " " ) ) ; int r = ( int ) Math . floor ( Math . sqrt ( n ) ) ; String ans = n == r * r ? " Yes " : " No " ; System . out . println ( ans ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (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 (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (string_literal) (string_literal))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (cast_expression type: (integral_type) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (ternary_expression condition: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier))) consequence: (string_literal) alternative: (string_literal)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))