C :

#include<stdio.h>
#include<stdlib.h>
int a,b;
int main()
{
	scanf("%d%d",&a,&b);
	int s=0;
	if(a>s)s=a;
	if(b>s)s=b;
	printf("%d",s*s);
   return 0;
}

C++ :

#include<iostream>
#include<cstdlib>
using namespace std;
int main()
{
	int a,b;
	cin>>a>>b;
	int a1=a*a;
	int b1=b*b;
	if(a>b)
	  cout<<a1;
	else
	  cout<<b1;
	//system("pause");
	return 0;
}

Pascal :

var
        a,b:integer;
begin
        read(a,b);
        if a>b then write(a*a)
               else write(b*b);
end.