#include <iostream>
using namespace std;
int main() {
int N, msurv, surv; // 응시자 수, 총 감독관, 부 감독관 감시인원
int *a; // 교실 별 응시자 수
long int ans = 0;
cin >> N;
a = new int[N];
for (int i = 0; i < N; i++) {
cin >> a[i];
}
cin >> msurv >> surv;
// 탐색
for (int i = 0; i < N; i++) {
a[i] -= msurv; // 총 감독관 감시인원 빼기
ans++;
if (a[i] <= 0) continue; // 총 감독관으로 끝났으면 넘어가기
ans += (a[i] / surv); // 부감독관 수 계산
if (a[i] % surv > 0) ans++;
}
cout << ans;
delete[] a;
return 0;
}
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