双指针做法
#include <iostream>
#include <cstring>
#include <algorithm>
using namespace std;
int n;
int main(){
cin >> n;
while(n--){
int maxn = -1;
string str,maxs;
cin >> str;
for(int i = 0;i < str.size();++i){
int j = i;
int cnt = 0;
while(str[j] == str[i] && j < str.size()){
j++;
cnt++;
}
if(cnt > maxn){
maxn = cnt;
maxs = str[i];
}
i = j - 1;
}
cout << maxs << ' ' << maxn << endl;
}
return 0;
}