static int countPrimeFrequent ( String s ) {
  int count = 0 ;
  Map < Character , Integer > mp = new HashMap < > ( ) ;
  for ( int i = 0 ;
  i < s . length ( ) ;
  i ++ ) {
    if ( mp . containsKey ( s . charAt ( i ) ) ) {
      mp . put ( s . charAt ( i ) , mp . get ( s . charAt ( i ) ) + 1 ) ;
    }
    else {
      mp . put ( s . charAt ( i ) , 1 ) ;
    }
  }
  for ( Map . Entry < Character , Integer > entry : mp . entrySet ( ) ) {
    if ( check_prime ( entry . getValue ( ) ) ) {
      count ++ ;
    }
  }
  return count ;
}

static int countPrimeFrequent ( String s ) { int count = 0 ; Map < Character , Integer > mp = new HashMap < > ( ) ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) { if ( mp . containsKey ( s . charAt ( i ) ) ) { mp . put ( s . charAt ( i ) , mp . get ( s . charAt ( i ) ) + 1 ) ; } else { mp . put ( s . charAt ( i ) , 1 ) ; } } for ( Map . Entry < Character , Integer > entry : mp . entrySet ( ) ) { if ( check_prime ( entry . getValue ( ) ) ) { count ++ ; } } return count ; }
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