#include #include using namespace std; int main() { int H, A, D; cin >> H >> A >> D; int CA = min((H + A - 1) / A, ((H + D - 1) / D * 3 + 1)/ 2); double C = CA; for (int ca = 0; ca <= CA; ca++) { int h = max(H - ca * A, 0); double cd = (h + D - 1) / D * 1.5; if (ca + cd < C) { C = ca + cd; } } cout << C; }