#include<stdio.h>
long int a,b,r;
int main()
{
	FILE *f;
	f=fopen("tort.in","r");
	fscanf(f,"%li%li",&a,&b);
	fclose(f);
	r=(a+1)*(b+1)*(a+b+2)/2;
	f=fopen("tort.out","w");
	fprintf(f,"%li",r);
	fclose(f);
	return 0;
}