文件目录

#include <iostream>
using namespace std;
int main()
{
    int k, l, r;
    cin >> k >> l >> r;
    int sum = 0;
    for (int i = l; i <= r; i++)
    {
        if (i % 10 == k || i % k == 0)
            sum += i;
    }
    cout << sum;
    return 0;
}