문제
풀이
#include <iostream>
using namespace std;
bool solve(void) {
int a1, a0; cin >> a1 >> a0;
int c; cin >> c;
int n0; cin >> n0;
return c <= a1 && c * n0 <= a1 * n0 + a0;
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout << solve();
return 0;
}