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OI-codes/Luogu/P8466/P8466.cpp

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#include <iostream>
#include <algorithm>
#include <string>
using std::cin;
using std::cout;
const char endl = '\n';
int t;
std::string s;
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> t;
while (t--) {
bool flag = false;
cin >> s;
std::sort(s.begin(), s.end());
if (s.find('X') != std::string::npos && s.find('D') != std::string::npos) {
flag = true;
}
int cnt = 1;
char lst = s[0];
for (int i = 1; i < s.size(); lst = s[i++]) {
if (s[i] == lst) {
cnt++;
} else {
if (cnt == 4) flag = true;
cnt = 1;
}
}
if (cnt == 4) flag = true;
cout << (flag ? "Yes" : "No") << endl;
}
return 0;
}