#include <iostream>
#include <fstream>

using namespace std;

int main() {
    int nline;
    cout << "Line number to remove (99 - remove everything): ";
    cin >> nline;

    if (nline == 99) {
        ofstream clear("Input.txt");
        clear.close();
    } else {
        ifstream input("Input.txt");
        ofstream tmp("Tmp.txt");
        string line;

        for (int i = 1; getline(input, line); i++) {
            if (nline != i) {
                tmp << line << endl;
            }
        }

        input.close();
        tmp.close();
        remove("Input.txt");
        rename("Tmp.txt", "Input.txt");
    }
}