big.go

package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"

	"math/big"
)

func main() {
	sc := NewScanner()
	ss := sc.NextLine()
	s := strings.Split(ss, " ")

	bigA := new(big.Int)
	bigB := new(big.Int)

	bigA.SetString(s[0], 10)
	bigB.SetString(s[1], 10)

	fmt.Println(bigA.Add(bigA, bigB)) // output for debug
}