public static void main ( String [ ] args ) {
  Scanner input = new Scanner ( System . in ) ;
  int n = input . nextInt ( ) ;
  int a [ ] [ ] = new int [ n ] [ n ] ;
  int one = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < n ;
    j ++ ) {
      a [ i ] [ j ] = input . nextInt ( ) ;
    }
  }
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < n ;
    j ++ ) {
      if ( a [ i ] [ j ] != 1 ) {
        boolean tf = check ( a , i , j , a [ i ] [ j ] ) ;
        if ( ! tf ) {
          System . out . println ( "NO" ) ;
          return ;
        }
      }
    }
  }
  System . out . println ( "YES" ) ;
}

public static void main ( String [ ] args ) { Scanner input = new Scanner ( System . in ) ; int n = input . nextInt ( ) ; int a [ ] [ ] = new int [ n ] [ n ] ; int one = 0 ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < n ; j ++ ) { a [ i ] [ j ] = input . nextInt ( ) ; } } for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < n ; j ++ ) { if ( a [ i ] [ j ] != 1 ) { boolean tf = check ( a , i , j , a [ i ] [ j ] ) ; if ( ! tf ) { System . out . println ( " NO " ) ; return ; } } } } System . out . println ( " YES " ) ; }
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