codeforces walking robot

 #include<bits/stdc++.h>
 #include <string>
 using namespace std;
 #define int long long
 #define endl "\n"
 const int mod=1e9+7;
 #define fast_io ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
 #define clr(a,x) memset(a,x,sizeof(a))
 #define T int t;cin>>t; while(t--)
 #define vll vector<int>
  #define pb push_back
 #define sz size
 #define str to_string
 #define intt stoll 
 int32_t main()
{
 fast_io;
int n,b,a,c=0,d=0;
cin>>n>>b>>a;
int p[n];
d=a;
for(int i=0;i<n;i++)
cin>>p[i];
for(int i=0;i<n;i++)
{
  if(p[i]==0)
  {
   if(a!=0)
{
  a--;
  c++;
}
   else if(b!=0 && a==0)
{
  b--;
  c++;
}
  }
  if(p[i]==1)
  {
    if(b!=0 && a<d)
    {
      b--;
      if(a<d)
      a++;
      c++;
    }
    else if(a!=0)
    {
  a--;
  c++;
    }
  }
}
cout<<c;
}