Problem:
Addition of Big Integers

Given two integers $A$ and $B$, compute the sum, $A + B$.

Input

Two integers $A$ and $B$ separated by a space character are given in a line.

Output

Print the sum in a line.

Constraints

$-1 \times 10^{100000} \leq A, B \leq 10^{100000}$

Sample Input 1

5 8

Sample Output 1

13

Sample Input 2

100 25

Sample Output 2

125

Sample Input 3

-1 1

Sample Output 3

0

Sample Input 4

12 -3

Sample Output 4

9

Solution in C# (judge verdict: Time Limit Exceeded)

using System;
using System.Linq;
using System.Numerics;
using System.Collections.Generic;
using static System.Math;
using System.Collections;

class P
{
    static void Main()
    {
        var ab = Console.ReadLine().Split().Select(BigInteger.Parse).ToList();
        Console.WriteLine(ab[0] + ab[1]);
    }
}