https://www.acmicpc.net/problem/10869
import 'dart:io';
void main(){
String? s=stdin.readLineSync();
final v=s!.split(' ').map<int> ((o)=>int.parse(o));
var a=v.elementAt(0);
var b=v.elementAt(1);
print(a+b);
print(a-b);
print(a*b);
print(a~/b);
print(a%b);
}