题解 | 穷哈哈~

#include <stdio.h>
#include<stdlib.h>

int main() {
    int n;
    scanf("%d",&n);
    char*s=(char*)malloc((n+1)*sizeof(char));
    scanf("%s",s);
    int curr=0;
    int max=0;
    for(int i=1;i<n;i++){
        if(s[i]=='a'&&s[i-1]=='h'||s[i]=='h'&&s[i-1]=='a'){
            curr++;
            if(curr>max)max=curr;
        }
        else curr=0;
    }
    for(int i=0;i<n;i++){
        if(s[i]=='a'||s[i]=='h'){
            max++;
            break;
        }
    }
    printf("%d",max);
    return 0;
}