URAL/1327

来自"NOCOW"

#include<stdio.h>
 
int main()
{
    int n,k,sum=0;
    scanf("%d %d",&n,&k);
    if((n%2==1)&&(k%2==1))
        sum+=1;
    sum+=(k-n+1)/2;
    printf("%d",sum);
    return 0;
}

program t1327;
var
  a,b,c:longint;
begin
  readln(a);
  readln(b);
  c:=(b-a+1)div 2;
  if (odd(a)) and (odd(b)) then inc(c);
  writeln(c);
end.

import java.io.*;
import java.util.*;
public class P1327 {
  public static void main(String[] args)throws IOException{
    Scanner input=new Scanner(System.in);
    PrintWriter output=new PrintWriter(System.out);
    int a=input.nextInt();
    int b=input.nextInt();
    int c=(int)((b-a+1)/2);
    if(a%2==1 && b%2==1)
      c++;
    output.println(c);
    input.close();
    output.close();
  }
}