C++ :

#include <iostream>
using namespace std;
int main()
{
	int a,b,c,t,s;
	cin>>a>>b>>c;
	if(a < b)
	{
		t = a;
		a = b;
		b = t;
	}
	if(a < c)
	{
		t = a;
		a = c;
		c = t;
	}
	if(b < c)
	{
		t = b;
		b = c;
		c = t;
	}
	s = a * b + b * c * 2 + a * c * 2;
	cout<<s;
	return 0;
}

Pascal :

var a:array[1..10000] of longint;
i,s,t,j:longint;
begin
for i:=1 to 3 do
read(a[i]);
for i:=1 to 3 do
for j:=i+1 to 3 do
if a[j]>a[i] then begin t:=a[i];a[i]:=a[j];a[j]:=t;end;
s:=a[1]*a[2]+a[1]*a[3]*2+a[2]*a[3]*2;
write(s);
end.

Java :

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int temp;
		int s = 0;
		if(a < b){
			temp = a;
			a = b;
			b = temp;	
		}
		if(b < c){
			temp = b;
			b = c;
			c = temp;
		}
		if(a < b){
			temp = a;
			a = b;
			b = temp;	
		}
		s = a * b + (2 * a * c) + (2 * b * c);
		System.out.println(s);
	}
}	

Python :

sr=input().split()
a=int(sr[0])
b=int(sr[1])
c=int(sr[2])
s=0
s=(a*b+a*c+b*c)*2
if a*b>a*c and a*b>b*c:
    s=s-a*b
elif a*c>a*b and a*c>b*c:
    s=s-a*c
else:
    s=s-b*c
print(s)