13458번: 시험 감독

#include<cstdio>
#include<vector>
using namespace std;
int main()
{
    int n, b, c, temp;
    long long int ans = 0;
    vector<int> a;
    scanf("%d", &n);
    for (int i = n; i--; a.push_back(temp))
        scanf("%d", &temp);
    scanf("%d %d", &b, &c);
    for (int i = 0; i < n; ++i)
    {
        a[i] -= b;
        if (a[i] < 1)
            ++ans;
        else
        {
            if (a[i] % c == 0)
                ans += ((a[i] / c) + 1);
            else
                ans += ((a[i] / c) + 2);
        }
    }
    printf("%lld\n", ans);
}