#include<bits/stdc++.h>
using namespace std;
#define int long long
const int MAXN = 20010;
int n, xi, yi, sum1, sum2, ans;
string s1, s2;
signed main() {
	freopen("zerone.in", "r", stdin);
	freopen("zerone.out", "w", stdout);
	cin >> n >> xi >> yi >> s1 >> s2;
	for(int i = 0; i < n; i ++) {
		sum1 += s1[i] == '1';
		sum2 += s2[i] == '1';
	}
	if(sum1 != sum2) {
		cout << -1;
		return 0;
	}
	if(yi <= xi) {
		sum1 = 0;
		for(int i = 0; i < n; i ++) {
			if(s1[i] == '1' && s2[i] != '1') {
				sum1 ++;
			}
		}
		cout << yi * sum1;
		return 0;
	}
	int pos = 0;
	for(int i = 0; i < n; i ++) {
		if(s1[i] == '0') {
			continue;
		}
		for(int j = pos; j < n; j ++) {
			if(s2[j] == '1') {
				ans += min(yi, xi * abs(j - i));
//				cout << ans << ' ' << i << ' ' << j << endl;
				pos = j + 1;
				break;
			}
		}
	}
	cout << ans;
	return 0;
}