public static void main ( String [ ] args ) {
  int n = 2 ;
  int [ ] [ ] c = {
    {
      1 , 0 }, {
        0 , 1 }
      };
      if ( isValid ( c , n ) ) System . out . println ( "Yes" ) ;
      else System . out . println ( "No" ) ;
    }
    
public static void main ( String [ ] args ) { int n = 2 ; int [ ] [ ] c = { { 1 , 0 } , { 0 , 1 } } ; if ( isValid ( c , n ) ) System . out . println ( " Yes " ) ; else System . out . println ( " No " ) ; }
(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: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_initializer (array_initializer (decimal_integer_literal) (decimal_integer_literal)) (array_initializer (decimal_integer_literal) (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier)))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))))))