#include <bits/stdc++.h>
using namespace std;
int main(){
    int m,n,a;
    cin>>m>>n;
    if(m>n){
    	a=(m-n)*m;
    }if(m<n){
    	a=(n-m)*n;
    }if(m==n){
    	a=0;
    }cout<<a;
}
/**************************************************************
	Problem: 1324
	User: sucongyi
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/