結果
問題 | No.2234 palindromer |
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 | 6,056 ms |
コンパイル使用メモリ | 308,076 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-17 23:38:51 |
合計ジャッジ時間 | 6,626 ms |
ジャッジサーバーID (参考情報) |
judge3 / 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; } } }