#include <bits/stdc++.h>
using namespace std;
void frepn() {
  freopen(
      ""
      ".in",
      "r", stdin);
  freopen(
      ""
      ".out",
      "w", stdout);
}
const int N = 50500;
const long long INF = (1e17) + 777;
const int mod = (1e9) + 7;
int n, a[N], k, t;
int ans, ans2, ans3, ans4;
int main() {
  ios_base::sync_with_stdio(0);
  ;
  cin >> n >> k >> t;
  ans = k * t;
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
    ans4 += a[i];
  }
  sort(a + 1, a + 1 + n);
  for (int i = n - k; i <= n; i++) {
    ans2 += a[i];
  }
  for (int i = 1; i <= n - k; i++) {
    ans3 += a[i];
  }
  if (ans2 < ans)
    cout << ans4;
  else
    cout << ans3 + ans;
  return 0;
}
