#define _USE_MATH_DEFINES #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include typedef long long int ll; //#include using namespace std; int gcd(int a, int b) { if (a < b)swap(a, b); if (b == 0)return a; return gcd(b, a % b); } int lcm(int a, int b) { return a * b / gcd(a, b); } int main() { int Q; Q = 1; //cin >> Q; while (Q--) { ll n; cin >> n; ll ans = 0; ll a, b, c; vectorx(3); cin >> a >> b >> c; ans += n / a + n / b + n / c; ans -= n / lcm(a, b) + n / lcm(a, c) + n / lcm(b, c); ans += n / lcm(a, lcm(b, c)); cout << ans; } return 0; }