D. Playing With Colors

#include <bits/stdc++.h>
using namespace std;
#define cin(v) for (auto &i : v) cin >> i;
#define cout(v) for (auto &i : v) cout << i << " "; cout<<'\n';
#define ll long long
#define ull unsigned long long
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define MOD 107
#define endl '\n'
#define Time cerr << "Time Taken: " << (float)clock() / CLOCKS_PER_SEC << " Secs"<< "\n";

void Warding()
{
    ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
#endif
}

/*
STOP USING int
*/


void solve(){
    string s; cin>>s;
    int a, b; cin>>a>>b;
    int n = s.size();
    int one = count(all(s),'1'), zero = n - one;
    ll cost1 = (one - count(s.begin(), s.begin() + one,'1'))*a;
    ll cost2 = (one - count(s.begin() + (n-one), s.end(),'1'))*a;
    ll cost3 = (zero - count(s.begin(), s.begin() + zero,'0'))*b;
    ll cost4 = (zero - count(s.begin() + (n-zero), s.end(),'0'))*b;
    cout<<min(cost1 + cost4, cost2 + cost3)<<endl;
}


int main()
{
    Warding();
    int TC = 1;
    // cin >> TC;
    while (TC--)
    {
        solve();
    }
    Time
}