#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;


int main(){
    int n,A,B,p,count = 0;
    cin >> n >> A >> B;

    while(A > 0 && B > 0) {
        cin >> p;
        if(p == 1){
            A--;
        } else if(p == 2) {
            B--;
        } else {
            A--;
            B--;
        }
        count++;
    }

    cout << count << endl;

    return 0;
}