結果
問題 | No.263 Common Palindromes Extra |
ユーザー | SSRS |
提出日時 | 2022-08-31 04:06:49 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,210 ms / 2,000 ms |
コード長 | 2,922 bytes |
コンパイル時間 | 1,937 ms |
コンパイル使用メモリ | 185,428 KB |
実行使用メモリ | 63,752 KB |
最終ジャッジ日時 | 2024-11-07 20:34:06 |
合計ジャッジ時間 | 6,114 ms |
ジャッジサーバーID (参考情報) |
judge3 / 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 | 10 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 3 ms
5,248 KB |
testcase_03 | AC | 30 ms
6,440 KB |
testcase_04 | AC | 130 ms
19,364 KB |
testcase_05 | AC | 104 ms
19,240 KB |
testcase_06 | AC | 16 ms
5,348 KB |
testcase_07 | AC | 354 ms
38,652 KB |
testcase_08 | AC | 324 ms
38,456 KB |
testcase_09 | AC | 1,181 ms
63,620 KB |
testcase_10 | AC | 1,210 ms
63,752 KB |
testcase_11 | AC | 86 ms
19,360 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; const long long BASE = 123456789; const long long M30 = ((long long) 1 << 30) - 1; const long long M31 = ((long long) 1 << 31) - 1; const long long MOD = ((long long) 1 << 61) - 1; unsigned long long modulo(unsigned long long x){ unsigned long long xu = x >> 61; unsigned long long xd = x & MOD; unsigned long long res = xu + xd; if (res >= MOD){ res -= MOD; } return res; } unsigned long long mul(unsigned long long a, unsigned long long b){ unsigned long long au = a >> 31; unsigned long long ad = a & M31; unsigned long long bu = b >> 31; unsigned long long bd = b & M31; unsigned long long mid = au * bd + ad * bu; unsigned long long midu = mid >> 30; unsigned long long midd = mid & M30; return modulo(au * bu * 2 + midu + (midd << 31) + ad * bd); } struct rolling_hash{ vector<long long> POW, S; rolling_hash(string s){ int N = s.size(); POW.resize(N + 1); POW[0] = 1; for (int i = 0; i < N; i++){ POW[i + 1] = mul(POW[i], BASE); } S.resize(N + 1); S[N] = 0; for (int i = N - 1; i >= 0; i--){ S[i] = modulo(mul(S[i + 1], BASE) + s[i]); } } long long get(int L, int R){ return modulo(S[L] + MOD - mul(S[R], POW[R - L])); } }; vector<int> manacher(string &S){ int N = S.size(); vector<int> ans(N, 0); int i = 0, j = 0; while (i < N){ while (i >= j && i + j < N && S[i - j] == S[i + j]){ j++; } ans[i] = j; int k = 1; while (i >= k && i + k < N && k + ans[i - k] < j){ ans[i + k] = ans[i - k]; k++; } i += k; j -= k; } return ans; } unordered_map<unsigned long long, int> solve(string S){ int N = S.size(); string T = "$"; for (int i = 0; i < N; i++){ T += S[i]; T += '$'; } vector<int> A = manacher(T); rolling_hash RH(S); unordered_map<unsigned long long, int> mp; priority_queue<pair<int, int>> pq; for (int i = 1; i < N * 2; i++){ int l = (i - A[i] + 2) / 2, r = (i + A[i] - 1) / 2; if (l < r){ unsigned long long hash = RH.get(l, r); if (mp.count(hash) == 0){ pq.push(make_pair(r - l, l)); } mp[hash]++; } } while (!pq.empty()){ int L = pq.top().second; int R = L + pq.top().first; pq.pop(); unsigned long long hash = RH.get(L, R); L++; R--; if (L < R){ unsigned long long hash2 = RH.get(L, R); if (mp.count(hash2) == 0){ pq.push(make_pair(R - L, L)); } mp[hash2] += mp[hash]; } } return mp; } int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); string S; cin >> S; string T; cin >> T; unordered_map<unsigned long long, int> A = solve(S); unordered_map<unsigned long long, int> B = solve(T); long long ans = 0; for (auto P : A){ if (B.count(P.first) == 1){ ans += (long long) P.second * B[P.first]; } } cout << ans << endl; }