同向双指针遍历字符串

#include<iostream>

using namespace std;

int main(){
    int n;
    cin >> n;
    while(n--){
        string s;
        cin >> s;
        int maxn = 0;
        char maxc = s[0];
        for(int i = 0; i < s.size();){
            int j = i + 1;
            int count = 1;
            while(s[j] == s[i] and j < s.size()){
                count ++;
                j ++;
            }
            if(count > maxn){
                maxc = s[i];
                maxn = count;
            }
            i = j;
        }
        cout << maxc << ' ' << maxn << endl;
    }
    return 0;
}