题解 | 穷哈哈~

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

int main() {
    int n;
    string s;
    cin>>n;
    cin>>s;
    int count = 1;
    int max_ = 1;
    int i = 0;
    while(s[i]!='a'&&s[i]!='h'&&i<n){
        i++;
    }
    if(i>=n){
        cout<<0<<endl;
        return 0;
    }
    for(int j = i+1;j<n;j++){
        if((s[j]=='a'&&s[j-1]=='h')||(s[j]=='h'&&s[j-1]=='a')){
            count++;
        }
        else if(s[j]=='a'||s[j]=='h') count=1;
        else count = 0;
        max_ = max(max_,count);
    }
    cout<<max_<<endl;
    return 0;
}
// 64 位输出请用 printf("%lld")