結果
問題 | No.263 Common Palindromes Extra |
ユーザー | maine_honzuki |
提出日時 | 2021-05-06 09:42:20 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 338 ms / 2,000 ms |
コード長 | 2,493 bytes |
コンパイル時間 | 2,446 ms |
コンパイル使用メモリ | 215,796 KB |
実行使用メモリ | 120,656 KB |
最終ジャッジ日時 | 2024-09-14 02:41:55 |
合計ジャッジ時間 | 4,800 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge6 |
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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 | 12 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 18 ms
5,376 KB |
testcase_04 | AC | 82 ms
9,848 KB |
testcase_05 | AC | 124 ms
9,336 KB |
testcase_06 | AC | 10 ms
5,376 KB |
testcase_07 | AC | 203 ms
40,416 KB |
testcase_08 | AC | 235 ms
39,576 KB |
testcase_09 | AC | 262 ms
74,184 KB |
testcase_10 | AC | 338 ms
120,656 KB |
testcase_11 | AC | 67 ms
9,076 KB |
ソースコード
//https://ncode.syosetu.com/n4830bu/263/ #include <bits/stdc++.h> using namespace std; using ll = long long; struct PalindromicTree { PalindromicTree() { node* size_m1 = create_node(); size_m1->suffix_link = 0; size_m1->len = -1; node* size_0 = create_node(); size_0->suffix_link = 0; size_0->len = 0; active_idx = 0; } struct node { map<char, int> link; int suffix_link, len, count; }; vector<node> nodes; string S; int active_idx; node* create_node() { nodes.emplace_back(); node* ret = &nodes.back(); ret->count = 0; return ret; } int find_prev_palindromic_idx(int node_id) { const int pos = (int)S.size() - 1; while (true) { const int opposite_side_idx = pos - 1 - nodes[node_id].len; if (opposite_side_idx >= 0 && S[opposite_side_idx] == S.back()) break; node_id = nodes[node_id].suffix_link; } return node_id; } void add(char ch) { S += ch; const int prev = find_prev_palindromic_idx(active_idx); const auto inserted_result = nodes[prev].link.insert(make_pair(ch, (int)nodes.size())); active_idx = inserted_result.first->second; if (!inserted_result.second) { nodes[active_idx].count++; return; } node* new_node = create_node(); new_node->count = 1; new_node->len = nodes[prev].len + 2; if (new_node->len == 1) { new_node->suffix_link = 1; } else { new_node->suffix_link = nodes[find_prev_palindromic_idx(nodes[prev].suffix_link)].link[ch]; } } vector<int> build_frequency() { vector<int> frequency(nodes.size()); for (int i = (int)nodes.size() - 1; i > 0; i--) { frequency[i] += nodes[i].count; frequency[nodes[i].suffix_link] += frequency[i]; } return frequency; } }; int main() { string S, T; cin >> S >> T; string ST = S + "#$" + T; auto maine = [&](string S) { PalindromicTree book; for (auto&& c : S) { book.add(c); } auto frequency = book.build_frequency(); ll ret = 0; for (int i = 2; i < frequency.size(); i++) { ret += 1ll * frequency[i] * (frequency[i] - 1) / 2; } return ret; }; cout << maine(ST) - maine(S) - maine(T) << endl; }