C :

#include <stdio.h>
void main()
{
	int m,n,a;
	scanf("%d%d",&m,&n);
	if(m>n){
		a=(m-n)*m;
	}else{
		a=(n-m)*n;
	}
	printf("%d",a);
}

C++ :

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

Pascal :

var a,b,c:longint;
begin
read(a,b);
if a>b then c:=(a-b)*a
       else c:=(b-a)*b;
       write(c);
       end.

Java :

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int m = sc.nextInt();
		int n = sc.nextInt();
		int s = 0;
		if(m > n){
			s = m * m - m * n;
		}
		if(m < n){
			s = n * n - m * n;
		}
		if(m == n){
			s = 0;
		}
		System.out.println(s);
	}
}	

Python :

x = input().split()
m = int(x[0])
n = int(x[1])
if m > n:
    print((m - n) * m)
if m < n:
    print((n - m) * n)