#include <iostream>
#include <vector>
#include <set>

using namespace std;

int main()
{
    unsigned long n, x, k;
    cin >> n >> x >> k;

    unsigned long d = k/n + 1;
    set<unsigned long> clocks;
    for (unsigned long i = 0; i < n; i++)
    {
        unsigned c;
        cin >> c;
        clocks.insert(c);
        for (unsigned j = 1; j <= d; j++)
        {
            clocks.insert(c + (j*x));
        }
    }
    auto start = clocks.begin() ;

    for (int i = 0; i < k -1; i++)
    {
        ++start;
    }
    cout << *start;
    return 0;
}