#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, a, b, c(0);
  cin >> n >> a >> b;
  string s;
  cin >> s;
  for (long long i = 0; i < n;) {
    if (s[i] == '0') {
      while (s[i] == '0') i++;
      c++;
    } else
      i++;
  }
  if (c == 0) return cout << 0, 0;
  cout << (c - 1) * min(a, b) + b;
  return 0;
}
