import std.stdio;

void main() {
    int n, d, x;
    readf("%d\n", &n);
    readf("%d %d\n", &d, &x);
    long result = x;
    foreach (i; 0 .. n) {
        int a;
        readf("%d\n", &a);
        for (int day = 1; day <= d; day += a) {
            ++result;
        }
    }
    writeln(result);
}
