#include <bits/stdc++.h>   using namespace std;   int main() {     int n, k, x, p, q, ans = 0, cnt = 0;     ;     cin >> n >> k >> x;     int a[n + 5];     for (int i = 1; i <= n; i++) {       cin >> a[i];     }     if (n == 1) {       cout << x << endl;       return 0;     }     for (int i = n; i > 1; i--) {       if (a[i] >= a[i - 1] && cnt < k) {         cnt++;         ans += x;       } else         ans += a[i];     }     if (cnt < k && a[1] <= a[2])       ans += x;     else       ans += a[1];     cout << ans << endl;   }   