結果
問題 | No.263 Common Palindromes Extra |
ユーザー | _____TAB_____ |
提出日時 | 2020-11-21 09:14:03 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 200 ms / 2,000 ms |
コード長 | 3,700 bytes |
コンパイル時間 | 1,106 ms |
コンパイル使用メモリ | 83,696 KB |
実行使用メモリ | 190,772 KB |
最終ジャッジ日時 | 2024-07-23 15:26:06 |
合計ジャッジ時間 | 2,281 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 6 ms
6,812 KB |
testcase_01 | AC | 1 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 11 ms
6,944 KB |
testcase_04 | AC | 50 ms
12,144 KB |
testcase_05 | AC | 44 ms
11,492 KB |
testcase_06 | AC | 7 ms
6,940 KB |
testcase_07 | AC | 122 ms
106,976 KB |
testcase_08 | AC | 120 ms
106,836 KB |
testcase_09 | AC | 200 ms
190,772 KB |
testcase_10 | AC | 136 ms
181,152 KB |
testcase_11 | AC | 43 ms
11,052 KB |
ソースコード
#include <cassert> #include <vector> #include <array> #include <iostream> template<typename T, int alphabetSize, T min_element> class PalindromicTree { struct Node { const int suffix_link; std::array<int,alphabetSize> ch; const int len; int cnt; Node(int suffix_link, int len) : suffix_link(suffix_link), ch(), len(len), cnt(1) { std::fill(ch.begin(), ch.end(), -1); }; // void dump(){ // std::cerr << "cnt : " << cnt << "\n"; // std::cerr << "suffix_link : " << suffix_link << "\n"; // for(int j = 0; j < alphabetSize; ++j){ // if(ch[j] >= 0){ // std::cout << std::string(1,'a'+j) << " " << ch[j] << std::endl; // } // } // std::cerr << "\n"; // } }; public: std::vector<Node> nodes; std::vector<T> dat; int len; std::vector<int> A; PalindromicTree() : nodes({Node(-1,-1), Node(0,0)}), dat(), len(0), A() {} bool push_back(T c){ dat.emplace_back(c); ++len; int parent_idx = A.empty() ? 0 : A.back(); // std::cerr << parent_idx << " " << len-2-nodes[parent_idx].len << std::endl; while(len-2-nodes[parent_idx].len < 0 or dat[len-2-nodes[parent_idx].len] != c){ parent_idx = nodes[parent_idx].suffix_link; } int v_idx = nodes[parent_idx].ch[c-min_element]; if(v_idx != -1){ ++nodes[v_idx].cnt; A.emplace_back(v_idx); return false; } int suffix_link = nodes[parent_idx].suffix_link; while(suffix_link >= 0 and (len-2-nodes[suffix_link].len < 0 or dat[len-2-nodes[suffix_link].len] != c)){ suffix_link = nodes[suffix_link].suffix_link; } if(suffix_link >= 0 and len-2-nodes[suffix_link].len >= 0 and dat[len-2-nodes[suffix_link].len] == c){ assert(nodes[suffix_link].ch[c-min_element] >= 0); suffix_link = nodes[suffix_link].ch[c-min_element]; } if(suffix_link < 0) suffix_link = 1; v_idx = nodes.size(); nodes[parent_idx].ch[c-min_element] = v_idx; nodes.emplace_back(suffix_link,nodes[parent_idx].len+2); A.emplace_back(v_idx); return true; } size_t num_unique_palindrome() const noexcept { return nodes.size()-2; } }; #include <iostream> using namespace std; void solve(){ string s, t; cin >> s >> t; const int alphabet_size = 26; PalindromicTree<char,alphabet_size,'A'> S, T; for(auto c : s) S.push_back(c); for(auto c : t) T.push_back(c); for(int i = S.nodes.size()-1; i >= 0; --i){ int sl = S.nodes[i].suffix_link; if(sl < 0) continue; S.nodes[sl].cnt += S.nodes[i].cnt; } for(int i = T.nodes.size()-1; i >= 0; --i){ int sl = T.nodes[i].suffix_link; if(sl < 0) continue; T.nodes[sl].cnt += T.nodes[i].cnt; } auto solve = [&](auto&& solve, const int& vs, const int& vt) -> long long { long long ret = 0; if(S.nodes[vs].len > 0){ long long cnt = (long long)(S.nodes[vs].cnt)*T.nodes[vt].cnt; ret += cnt; } for(int i = 0; i < alphabet_size; ++i){ int us = S.nodes[vs].ch[i], ut = T.nodes[vt].ch[i]; if(us < 0 or ut < 0) continue; ret += solve(solve,us,ut); } return ret; }; long long ans = solve(solve,0,0) + solve(solve,1,1); cout << ans << endl; } // void debug(){ // string s; // cin >> s; // const int alphabet_size = 26; // PalindromicTree<char,alphabet_size,'a'> eerTree; // for(auto c : s){ // eerTree.push_back(c); // } // for(size_t i = 0; i < eerTree.nodes.size(); ++i){ // cerr << "Node " << i << "\n"; // eerTree.nodes[i].dump(); // } // cout << eerTree.num_unique_palindrome() << endl; // } int main(){ solve(); // debug(); }