简易版

#include<iostream>
using namespace std;
 
int main()
{
	string s;
	cin>>s;
	int c=0,k=0;
	for(int i=0;i<s.size()-1;i++)
	{
		if(s[i]=='A'&&s[i+1]=='C')
			c++;
		else if((s[i]=='A'&&s[i+1]=='A'&&s[i+2]!='C')||(s[i]=='C'&&s[i+1]=='C'&&s[i-1]!='A'))
			k=1;
	}
	cout<<c+k<<endl;
	return 0;
}