public static void main ( String [ ] args ) throws Exception {
  BufferedReader input = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  int min = 0 ;
  int n = Integer . parseInt ( input . readLine ( ) ) ;
  StringTokenizer tokenizer = new StringTokenizer ( input . readLine ( ) ) ;
  int [ ] value = new int [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    value [ i ] = Integer . parseInt ( tokenizer . nextToken ( ) ) ;
  }
  boolean state = true ;
  while ( state ) {
    for ( int i = 0 ;
    i < n && state ;
    i ++ ) {
      if ( ( value [ i ] & 1 ) == 0 ) {
        value [ i ] /= 2 ;
      }
      else {
        state = false ;
      }
    }
    if ( state ) min ++ ;
  }
  System . out . println ( min ) ;
}

public static void main ( String [ ] args ) throws Exception { BufferedReader input = new BufferedReader ( new InputStreamReader ( System . in ) ) ; int min = 0 ; int n = Integer . parseInt ( input . readLine ( ) ) ; StringTokenizer tokenizer = new StringTokenizer ( input . readLine ( ) ) ; int [ ] value = new int [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { value [ i ] = Integer . parseInt ( tokenizer . nextToken ( ) ) ; } boolean state = true ; while ( state ) { for ( int i = 0 ; i < n && state ; i ++ ) { if ( ( value [ i ] & 1 ) == 0 ) { value [ i ] /= 2 ; } else { state = false ; } } if ( state ) min ++ ; } System . out . println ( min ) ; }
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