func_code_string: #include <bits/stdc++.h>   using namespace std;   const long double eps = 1e-9;   const int inf = (1 << 30) - 1;   const long long inf64 = ((long long)1 << 62) - 1;   const long double pi = acos(-1);   template <class T>   T sqr(T x) {     return x * x;   }   template <class T>   T abs(T x) {     return x < 0 ? -x : x;   }   int main() {     ios_base::sync_with_stdio(0);     int n, t, k, d;     cin >> n >> t >> k >> d;     cout << ((d / t + 1) * k >= n ?  NO  :  YES ) << endl;     return 0;   }   