static String ReverseComplement ( char [ ] s , int n , int k ) {
  int rev = ( k + 1 ) / 2 ;
  int complment = k - rev ;
  if ( rev % 2 == 1 ) s = reverse ( s ) ;
  if ( complment % 2 == 1 ) {
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      if ( s [ i ] == '0' ) s [ i ] = '1' ;
      else s [ i ] = '0' ;
    }
  }
  return String . valueOf ( s ) ;
}

static String ReverseComplement ( char [ ] s , int n , int k ) { int rev = ( k + 1 ) / 2 ; int complment = k - rev ; if ( rev % 2 == 1 ) s = reverse ( s ) ; if ( complment % 2 == 1 ) { for ( int i = 0 ; i < n ; i ++ ) { if ( s [ i ] == '0' ) s [ i ] = '1' ; else s [ i ] = '0' ; } } return String . valueOf ( s ) ; }
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