2 lygis | 1 pamoka| Skaitymas

#include <fstream>
using namespace std;

const char duom[] = "Duomenys.txt";
const char rez[] = "Rezultatai.txt";

int perskaitys_per_dienu(int n, const int a, const int b) {
    int dienos = 0;
    while( n > 0 )
        n -= a + (b * dienos++);
    return dienos;
}

int main() {
    int n, a, b;
    ifstream in(duom);
    ofstream out(rez);
    while( in >> n >> a >> b )
        out << perskaitys_per_dienu(n, a, b) << endl;
    return 0;
}