#include<bits/stdc++.h>
using namespace std;
bool arr[1006];
int main()
{
int n,m,k,num_wesh=0,l;
scanf("%d %d %d",&n,&m,&k);
for(int i=0; i<n; ++i)
{
cin>>l;
l--;
arr[i]=l;
}
for(int i=0; i<n; ++i)
{
if(arr[i])
{
if(k)
k--;
else if(m)
m--;
else
num_wesh++;
}
else
{
if(m)
m--;
else
num_wesh++;
}
}
printf("%d",num_wesh);
return 0;
}
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