1071

#include<stdio.h>

main()

{
    int x,y,i,s=0,temp;

    scanf("%d %d",&x,&y);
    if(x>y)
      {
      temp=x;
      x=y;
      y=temp;
      }

    for(i=x;i<=y;i++)
    {
        if(i%2!=0&&i%2>0)
        {
            s=s+i;
        }
    }


    printf("%d",s);

    return 0;

}