#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include <stdlib.h>

#define ASCII_OFFSET    0x20

void reverse( char *buf, int size ) {
  int i;
  for( i = 0; i < size; i++ )  {
     if(!isalpha(buf[i]))
        continue;
     if( isupper(buf[i]) ) 
        buf[i] += ASCII_OFFSET;
     else
        buf[i] -= ASCII_OFFSET;
  }
}

void inverse( char *buf, int size ) {
   int i, s = size-1, len;
   for( i = 0, len = (int)(size/2); i < len; i++ ) {
      buf[i] ^= buf[s-i];
      buf[s-i] ^= buf[i];
      buf[i] ^= buf[s-i];
   }
}

int count( char* buf, int size ) {
   int i, count = 0;
   for( i = 0; i < size; i++ ) {
      if(isupper(buf[i])) 
         count++;
   }
   return count;
}