AtCoder用の入出力ルーチン付きテンプレート

main.go

/*++++ a code submitted by shunsk2020 +++++++++++++
              /＼  ／ヽ
             {／￣￣￣ヽ!
             ∠＿＿╋＿＿ｊ
 AC ヨシ!   / (.)八(.)  ヽ
           ｛=/(人_)=|´￣)｀ヽ
            ＼ { {_,ﾉ ﾉ   //~ `
        ⊂￣ヽ_＞―――‐''’,〈   (＿)
         `ヘ(＿ ィ r―‐γ   !
              _,ﾉ j   |   |
            ｛   ｛    ﾉ  /＼
             ＼ス￣￣￣lしｲ＼ ＼
            (￣ ）     j /   ＼_j＼
             ￣￣     ( ｀ヽ   ＼__)
                       ＼__ﾉ
++++++++++++++++++++++++++++++++++++++++++++++++++*/

package main

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

//+++++++++++++++++++++++++++++++++++++++
// 準備用の処理
//+++++++++++++++++++++++++++++++++++++++
var sc = bufio.NewScanner(os.Stdin)
var wr = bufio.NewWriter(os.Stdout)

func init(){
  sc.Buffer([]byte{},math.MaxInt64)
  sc.Split(bufio.ScanWords)
}

//+++++++++++++++++++++++++++++++++++++++
// main
//+++++++++++++++++++++++++++++++++++++++

func main() {
  defer func(){ wr.Flush()}()

  //ここに処理を書く
  n:=in()
  out(n)

}


//+++++++++++++++++++++++++++++++++++++++
// 入力用の関数
//+++++++++++++++++++++++++++++++++++++++

//文字列を読み込む関数
func ins() string {
  sc.Scan()
  return sc.Text()
}

//Intを読み込む関数
func in() int {
  return atoi(ins())
}

// Intを読み込む関数
// 2個の変数にいっぺんで読み込むパターン
func in2() (int,int) {
  return atoi(ins()),atoi(ins())
}

// 浮動小数点数を読み込む関数
func infl() float64 {
  return atof(ins())
}


//+++++++++++++++++++++++++++++++++++++++
// 出力用の関数
//+++++++++++++++++++++++++++++++++++++++

//改行付き出力
func out(x ...interface{}){
  fmt.Fprintln(wr, x...)
}

//フォーマット出力
func outf(s string, x ...interface{}){
  fmt.Fprintf(wr, s, x...)
}

//+++++++++++++++++++++++++++++++++++++++
// 変換用の関数
//+++++++++++++++++++++++++++++++++++++++

func atoi(s string) int{
  i,e := strconv.Atoi(s)
  if e != nil{
    panic(e)
  }
  return i
}

func atof(s string) float64{
  f,e := strconv.ParseFloat(s,64)
  if e != nil{
    panic(e)
  }
  return f
}

func itoa(i int) string{
  return strconv.Itoa(i)
}