include[HTML_REMOVED]

using namespace std;
int main()
{
int a,b,i,s=0;
scanf(“%d\n%d\n”,&a,&b);
if(a>b)
{
for(i=b+1;i<a;i)
{
if((i+1)%2==0)
s=s+i;
}
}
else if(a==b)
s=0;
else if(a<b)
{
for(i=a+1;i<b;i)
{
if((i+1)%2==0)
s=s+i;
}
}
printf(“%d”,s);
return 0;
}