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- #define _USE_MATH_DEFINES
- #include <iostream>
- #include <string>
- #include <map>
- #include <set>
- #include <algorithm>
- #include <vector>
- #include <stdio.h>
- #include <cmath>
- #include <math.h>
- #include <queue>
- #include <stack>
- #include <climits>
- #include <deque>
- #include <ctime>
- using namespace std;
- typedef long long ll;
- typedef unsigned long long ull;
- typedef unsigned int ui;
- #define mh() make_heap()
- #define poph() pop_heap()
- #define pushh() push_heap()
- #define sor(n) n.begin(), n.end()
- #define mp make_pair
- int main()
- {
- string s;
- getline(cin, s);
- for (int i = 0; i < s.size(); i++)
- {
- string h = s;
- string u = s.substr(0, i + 1);
- reverse(sor(u));
- h += u;
- if (h.size() % 2 == 0)
- {
- u = h.substr(0, h.size() / 2);
- reverse(sor(u));
- string t = h.substr(h.size() / 2, h.size() - 1);
- if (t == u)
- {
- cout << h;
- break;
- }
- }
- else
- {
- u = h.substr(0, h.size() / 2);
- reverse(sor(u));
- string t = h.substr(h.size() / 2 + 1, h.size()- h.size() / 2 - 2+1);
- if (t == u)
- {
- cout << h;
- break;
- }
- }
- }
- system("pause");
- return 0;
- }
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