#include <bits/stdc++.h>
using namespace std;
typedef long double ld;
const ld eps = 1e-8;
const ld tau = 2 * acosl(-1);
const int inf = 1e9 + 99;
const long long linf = 1e18 + 99;
const int P = 1e9 + 7;
const int N = 100 << 10;
int a[N], n, k, m;
int ct[N * 5], b[N * 5];
int solve(const vector<int> &v) {
  int i = 1;
  for (int x : v) {
    b[i] = x;
    if (i > 1 && b[i] == b[i - 1])
      ct[i] = ct[i - 1] + 1;
    else
      ct[i] = 1;
    if (ct[i] == k) i -= k;
    ++i;
  }
  return i - 1;
}
int32_t main() {
  scanf("%d%d%d", &n, &k, &m);
  int i = 1;
  for (int j = 1; j <= n; j++) {
    scanf("%d", a + i);
    if (i > 1 && a[i] == a[i - 1])
      ct[i] = ct[i - 1] + 1;
    else
      ct[i] = 1;
    if (ct[i] == k) i -= k;
    ++i;
  }
  int L = 1, R = i - 1;
  vector<int> ww, vv;
  for (; L <= R && a[L] == a[R];) {
    int tr = 0;
    for (int i = R; i >= L; i--) {
      if (tr >= k) break;
      if (a[i] == a[R])
        ++tr;
      else
        break;
    }
    int st = 0;
    for (int i = L; i <= R; i++) {
      if (st >= k) break;
      if (a[i] == a[L])
        ++st;
      else
        break;
    }
    if (st + tr >= R - L + 1) {
      int err = int(1LL * (R - L + 1) * m % k);
      if (err)
        for (; err < k && vv.size() && vv.back() == a[L];) vv.pop_back(), ++err;
      if (err)
        for (; err < k && ww.size() && ww.back() == a[R];) ww.pop_back(), ++err;
      err %= k;
      if (err)
        printf("%d\n", solve(vv) + solve(ww) + err);
      else {
        reverse(ww.begin(), ww.end());
        for (int x : ww) vv.push_back(x);
        printf("%d\n", solve(vv));
      }
      return 0;
    }
    if (st + tr >= k) {
      tr = min(tr, k - st);
      for (; st;) vv.push_back(a[L++]), --st;
      for (; tr;) ww.push_back(a[R--]), --tr;
      assert(L <= R);
    } else
      break;
  }
  long long Z = 1LL * m * (R - L + 1);
  assert(solve(vv) == (int)vv.size());
  assert(solve(ww) == (int)ww.size());
  if (!Z) {
    reverse(ww.begin(), ww.end());
    for (int x : ww) vv.push_back(x);
    printf("%d\n", solve(vv));
  } else {
    printf("%lld\n", Z + solve(vv) + solve(ww));
  }
}
