#include(stdio.h)
main()
{int a,b,c,i;
scanf("%d%d",&a,&b);
c=a*a+b*b;
i=c/100;
if(c<=100)
printf("%d",c);
else
{ switch(i)
{       case'1':printf("1");break;
        case'2':printf("2");break;
        case'3':printf("3");break;
        case'4':printf("4");break;
        case'5':printf("5");break;
        case'6':printf("6");break;
        case'7':printf("7");break;
        case'8':printf("8");break;
        case'9':printf("9");break;
        default:printf("%d",i%10);
}
}
}