#include <stdio.h>
int main(void)
{
int num;
// 数値を受け取って、2倍した値を出力する
return 0;
}
CiNpbmNsdWRlIDxzdGRpby5oPgoKaW50IG1haW4odm9pZCkKewogICAgaW50IG51bTsKCiAgICAvLyDmlbDlgKTjgpLlj5fjgZHlj5bjgaPjgabjgIHvvJLlgI3jgZfjgZ/lgKTjgpLlh7rlipvjgZnjgosKICAgIHB1dHMoICLmlbDlgKTjgpLlhaXlipvjgZfjgabjgY/jgaDjgZXjgYTjgIIiICk7CiAgICBzY2FuZiggIiVkIiwgJm51bSApOwogICAgcHJpbnRmKCAiJWRcbiIsIG51bSAqIDIgKTsKCiAgICByZXR1cm4gMDsKfQ==