#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	cin>>a>>b;
	if(a<b) swap(a,b);
	cout<<(a-b)*a;
}
/**************************************************************
	Problem: 1324
	User: linzihang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/