Help me in solving EPANLNK problem

help
,
1

My issue

Everything I have written in my code seems to be correct though it is throwing errors. Please help me realize my mistake in the code.

My code

 /*

                      ?O?w?n?e?r? ?S?l?y?g?r?i?n?

 */
 
 #include <iostream>
 #include <string>
 
 using namespace std;

int main() {
    int t;
    cin >> t;
    cin.ignore();

    while (t--) {
        string n_str;
        getline(cin, n_str);

        int no_of_applications = 0;
        int remaining_applications = 0;

        if (n_str.length() > 18) {
            no_of_applications = 1;
            remaining_applications = 19;
        } else {
            long long n = stoll(n_str);
            no_of_applications = n / 20;
            remaining_applications = n - no_of_applications * 20;
        }

        cout << remaining_applications << "\n";
    }

    return 0;
}

Problem Link: EPANLNK Problem - CodeChef