#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a>>b;
	if(a<b){
		c=(b-a)*b;
	}else if(a>b){
		c=(a-b)*a;
	}
	cout<<c;
}

/**************************************************************
	Problem: 1324
	User: toughuatao1
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/