A. Angry Students

http://codeforces.com/contest/1287/problem/A

找到出现A之后最大连续的P的数量即可

代码

#include <iostream>
#include <string>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <algorithm>

using namespace std;

int main()
{
    int t, n;
    string s;
    cin>>t;
    while(t--)
    {
        cin>>n;
        cin>>s;
        bool flag = false;
        int num = 0;
        int ans = 0;
        for (int i = 0; i < s.size(); ++i)
        {
            if (flag)
            {
                if (s[i] == 'A')
                {
                    num = 0;
                }
                else
                {
                    num++;
                    ans = max(ans, num);
                }
            }
            else
            {
                if(s[i] == 'A')
                {
                    flag = true;
                }
                else
                {
                    continue;
                }
            }
        }
        cout<<ans<<endl;
    }
    return 0;
}