Alien Invasion II

#include <iostream>
#include <algorithm> 
#include <vector>
#include <string>

using namespace std;
int main() {
	//freopen("cases.txt", "r", stdin);

	string a;
	long long b;
	cin >> a;
	
	a.append("2");

	cout << a << endl;
	
	b = stoi(a) / 2;

	cout << "2 " << b << endl;

	return 0;
}

Test 1

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  stoi

Test 2

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  stoi

Test 3

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  stoi