#include <iostream>
#include <math.h>
#include <vector>
#include <string>
#include <algorithm>
#include <queue>
#include <stack>
#include <map>
#include <cstring>
#include <iomanip>
#include <set>
#include <bitset>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using pii = pair<ll,ll>;
#define endl '\n'
#define f first
#define s second
#define all(x) begin(x),end(x)
int main(){
int n;cin >> n;
int a,b;cin >> a >> b;
int ans =0 ;
for(int i{};i < n;i++){
int g;cin >> g;
ans += min(g*a,b);
}
cout << ans;
}
