#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,j,m;
	cin>>a>>j;
	if(a<j){
		m=(j-a)*j;
		cout<<m;
	}
	if(j<a){
		m=(a-j)*a;
		cout<<m;
	}
	}
/**************************************************************
	Problem: 1324
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/