結果
| 問題 |
No.2234 palindromer
|
| コンテスト | |
| ユーザー |
AngrySadEight
|
| 提出日時 | 2023-03-03 22:38:46 |
| 言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 3,557 bytes |
| コンパイル時間 | 25,003 ms |
| コンパイル使用メモリ | 357,508 KB |
| 最終ジャッジ日時 | 2025-02-11 03:25:15 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 13 |
ソースコード
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n) - 1; i >= 0; i--)
#define repk(i, k, n) for (int i = k; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define mod1 1000000007
#define mod2 998244353
#define mod3 100000007
#define vi vector<int>
#define vs vector<string>
#define vc vector<char>
#define vl vector<ll>
#define vb vector<bool>
#define vvi vector<vector<int>>
#define vvc vector<vector<char>>
#define vvl vector<vector<ll>>
#define vvb vector<vector<bool>>
#define vvvi vector<vector<vector<int>>>
#define vvvl vector<vector<vector<ll>>>
#define pii pair<int,int>
#define pil pair<int,ll>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define vpii vector<pair<int,int>>
#define vpll vector<pair<ll,ll>>
#define vvpii vector<vector<pair<int,int>>>
#define vvpll vector<vector<pair<ll,ll>>>
template<typename T> void debug(T e){
cerr << e << endl;
}
template<typename T> void debug(vector<T> &v){
rep(i, v.size()){
cerr << v[i] << " ";
}
cerr << endl;
}
template<typename T> void debug(vector<vector<T>> &v){
rep(i, v.size()){
rep(j, v[i].size()){
cerr << v[i][j] << " ";
}
cerr << endl;
}
}
template<typename T> void debug(vector<pair<T, T>> &v){
rep(i,v.size()){
cerr << v[i].first << " " << v[i].second << endl;
}
}
template<typename T> void debug(set<T> &st){
for (auto itr = st.begin(); itr != st.end(); itr++){
cerr << *itr << " ";
}
cerr << endl;
}
template<typename T> void debug(multiset<T> &ms){
for (auto itr = ms.begin(); itr != ms.end(); itr++){
cerr << *itr << " ";
}
cerr << endl;
}
template<typename T> void debug(map<T, T> &mp){
for (auto itr = mp.begin(); itr != mp.end(); itr++){
cerr << itr->first << " " << itr->second << endl;
}
}
void debug_out(){
cerr << endl;
}
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T){
cerr << H << " ";
debug_out(T...);
}
void dijkstra(vvpll &graph, ll v, vl &dist, vl &cnt){
priority_queue<pll, vpll, greater<pll>> pque;
vector<bool> decided(graph.size());
pque.push(pll(0, v));
cnt[v] = 1;
dist[v] = 0;
while(pque.size()){
pll p = pque.top();
pque.pop();
if (dist[p.second] < p.first){
continue;
}
decided[p.second] = true;
for (auto x: graph[p.second]){
if (dist[x.first] + x.second == dist[p.second] && decided[x.first]){
cnt[p.second] = (cnt[p.second] + cnt[x.first]) % mod1;
}
}
for (auto x: graph[p.second]){
if (dist[x.first] > dist[p.second] + x.second){
dist[x.first] = dist[p.second] + x.second;
pque.push(pll(dist[x.first], x.first));
}
}
}
}
bool ispalind(string &S){
bool ret = true;
ll len = S.size();
for (ll i = 0; i < len; i++){
if (S[i] != S[len - 1 - i]) ret = false;
}
return ret;
}
int main(){
string A;
cin >> A;
ll N = A.size();
for (ll i = 0; i <= N; i++){
string T = A.substr(0, i);
reverse(all(T));
string U = A + T;
//debug(U);
if (ispalind(U)){
cout << U << endl;
return 0;
}
}
}
AngrySadEight