package main

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

    func add(info string) int {
        numStrList := strings.Split(info, " ");
        num1, err := strconv.Atoi(numStrList[0])
        if err != nil {
            return 0
        }
        num2, err := strconv.Atoi(numStrList[1])
        if err != nil {
            return 0
        }
        return num1 + num2
    }

    func main(){
        reader := bufio.NewReader(os.Stdin)
        text, err := reader.ReadString('\n')
        if err != nil && err != io.EOF{
                fmt.Println("读取输入时发生错误:", err)
                return
        }
        re := strings.Split(text,"\n")
        fmt.Println(add(re[0]))
    }