07. Working Hours

#include <iostream>

using namespace std;

int main() {
    int hour;
    cin >> hour;

    string dayOfWeek;
    cin >> dayOfWeek;

    if (dayOfWeek != "Sunday" && hour >= 10 && hour <= 18) {
        cout << "open" << endl;
    }
    else {
        cout << "closed" << endl;
    }

    return 0;
}

Решение с тернарен оператор:

#include <iostream>

using namespace std;

int main() {
    int hour;
    cin >> hour;

    string dayOfWeek;
    cin >> dayOfWeek;

    cout << (dayOfWeek != "Sunday" && hour >= 10 && hour <= 18 ? "open" : "closed") << endl;

    return 0;
}