是个人都能看懂的题解

#include <iostream>
#include <vector>
using namespace std;
int main(){
	string a;
	cin >> a;
	int b = 0,e = 0,i = 0;
	for(char c : a){
		b = (char)c;
        e++;
	}
    vector<int> d(e);
    for(char c : a){
        b = (char)c;
        d[i] = b;
        i++;
    }
    int v = 0;
    for(int i = 0;i < e;i++){
        if(d[i] == 97 && d[i + 1] == 99){
            v++;
        }
    }
    cout << v;
	return 0;
}