题解 | #查找兄弟单词#

#include <bits/stdc++.h>
using namespace std;

bool isbro(string s1, string s2) {
    if (s1.size() == s2.size()) {
        if (s1 == s2) {
            return false;
        }
        sort(s1.begin(), s1.end());
        sort(s2.begin(), s2.end());
        if (s1 == s2) {
            return true;
        }
    } 
    return false; 
}

int main() {
    int n;
    while (cin >> n) {
        vector<string> strs(n);
        for (int i = 0; i < n; i++) {
            cin >> strs[i];
        }
        string str;
        cin >> str;
        int k;
        cin >> k;
        vector<string> bros;
        for (int i = 0; i < n; i++) {
            if (isbro(str, strs[i])) {
                bros.push_back(strs[i]);
            }
        }
        sort(bros.begin(), bros.end());
        cout << bros.size() << endl;
        if(k < bros.size())
        cout << bros[k - 1] << endl;
    }
}