#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: zhangyilei
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/