#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m;
	cin>>n>>m;
	if(n>m) cout<<(n-m)*n;
	if(n==m) cout<<0;
	if(n<m) cout<<(m-n)*m;
}

/**************************************************************
	Problem: 1324
	User: zhangziang
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/