Envío 5054

Código

package main

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

func main() {
	reader := bufio.NewReader(os.Stdin)

	number, _ := reader.ReadString('\n')
	number = strings.ReplaceAll(number, "\n", "")
	number2, _ := reader.ReadString('\n')
	number2 = strings.ReplaceAll(number2, "\n", "")
	out := []rune(number)
	out2 := []rune(number2)
	if len(number) < len(number2) {
		out = []rune(number2)
		out2 = []rune(number)
	}
	sum := true
	index := len(number) - 1
	sumOne := false
	diference := len(out) - len(out2)
	for sum && index >= 0 {
		numberIndex, _ := strconv.ParseInt(string(out[index]), 10, 64)
		if index-diference >= 0 {
			numberIndex2, _ := strconv.ParseInt(string(out2[index-diference]), 10, 64)
			numberIndex += numberIndex2
		}
		if sumOne {
			numberIndex += 1
			sumOne = false
		}
		if numberIndex > 9 {
			number := fmt.Sprintf("%d", numberIndex)
			out[index] = []rune(number)[1]
			sumOne = true
			if index == 0 {
				out = append([]rune("1"), out...)
			}
		} else {
			out[index] = []rune(fmt.Sprintf("%d", numberIndex))[0]
			if index-diference < 0 {
				sum = false
			}

		}
		index--
	}

	fmt.Println(string(out))
}