結果
問題 | No.515 典型LCP |
ユーザー | pekempey |
提出日時 | 2017-09-13 22:56:07 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 542 ms / 1,000 ms |
コード長 | 5,268 bytes |
コンパイル時間 | 2,965 ms |
コンパイル使用メモリ | 222,220 KB |
実行使用メモリ | 93,960 KB |
最終ジャッジ日時 | 2024-11-07 20:08:19 |
合計ジャッジ時間 | 8,746 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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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 | 542 ms
91,700 KB |
testcase_01 | AC | 402 ms
92,192 KB |
testcase_02 | AC | 239 ms
87,636 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 286 ms
93,924 KB |
testcase_06 | AC | 287 ms
90,796 KB |
testcase_07 | AC | 293 ms
93,788 KB |
testcase_08 | AC | 312 ms
93,960 KB |
testcase_09 | AC | 195 ms
90,884 KB |
testcase_10 | AC | 194 ms
90,888 KB |
testcase_11 | AC | 193 ms
90,884 KB |
testcase_12 | AC | 194 ms
90,888 KB |
testcase_13 | AC | 195 ms
90,880 KB |
testcase_14 | AC | 139 ms
90,904 KB |
testcase_15 | AC | 293 ms
93,852 KB |
testcase_16 | AC | 289 ms
90,732 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; class SuffixDataStructure { public: // a[i]>=0 SuffixDataStructure(const std::vector<int> &a) : a(a) { sa = suffix_array(a); sa.insert(sa.begin(), a.size()); build_lcp(); build_rmq(); } int get_lcp(int i, int j) { if (i == j) { return a.size() - std::max(i, j); } i = isa[i]; j = isa[j]; if (i > j) { std::swap(i, j); } int k = __lg(j - i); // int k = lg[j - i]; return std::min(rmq[k][i], rmq[k][j - (1 << k)]); } private: const std::vector<int> &a; std::vector<int> sa; std::vector<int> isa; std::vector<int> lcp; std::vector<int> lg; std::vector<std::vector<int>> rmq; vector<int> suffix_array(vector<int> a) { const int n = a.size(); if (n == 0) return {}; constexpr int TYPE_L = 0, TYPE_S = 1; const auto mp = [](vector<int> f, vector<int> a) { for (int &x : a) x = f[x]; return a; }; const auto filter = [](auto f, vector<int> a) { vector<int> y; for (int &x : a) if (f(x)) y.push_back(x); return y; }; const auto seq = [](int n) { vector<int> a(n); for (int i = 0; i < n; i++) a[i] = i; return a; }; const auto freq = [](vector<int> a) { vector<int> f(*max_element(a.begin(), a.end()) + 1); for (int x : a) f[x]++; return f; }; const auto tail = [](vector<int> a) { a.erase(a.begin()); return a; }; const auto pairs = [](vector<int> a) { vector<pair<int, int>> b; for (int i = 0; i + 1 < a.size(); i++) b.emplace_back(a[i], a[i + 1]); return b; }; const auto scanl = [](auto f, auto acc, auto a) { vector<decltype(acc)> b(a.size() + 1); b.front() = acc; for (int i = 0; i < a.size(); i++) b[i + 1] = acc = f(acc, a[i]); return b; }; const auto scanr = [](auto f, auto acc, auto a) { vector<decltype(acc)> b(a.size() + 1); b.back() = acc; for (int i = int(a.size()) - 1; i >= 0; i--) b[i] = acc = f(a[i], acc); return b; }; const auto runl = [](vector<int> &a, auto pred, auto f) { for (int i = 0; i < a.size(); i++) if (pred(a[i])) f(a[i]); }; const auto runr = [](vector<int> &a, auto pred, auto f) { for (int i = int(a.size()) - 1; i >= 0; i--) if (pred(a[i])) f(a[i]); }; const auto run_pairs = [](vector<int> a, auto f) { for (int i = 0; i + 1 < a.size(); i++) f(a[i], a[i + 1]); }; const auto type = scanr([](pair<int, int> a, int acc) { return a.first == a.second ? acc : a.first < a.second; }, TYPE_L, pairs(a)); const auto induced_sort = [&](vector<int> lms) { vector<int> sa(n, -1); auto L = scanl([](int a, int b) { return a + b; }, 0, freq(a)), S = tail(L), SS = S; sa[L[a.back()]++] = n - 1; auto is_type_l = [&](int k) { return k > 0 && type[k - 1] == TYPE_L; }; auto is_type_r = [&](int k) { return k > 0 && type[k - 1] == TYPE_S; }; runr(lms, [](int x) { return true; }, [&](int i) { sa[--SS[a[i]]] = i; }); runl(sa, is_type_l, [&](int i) { sa[L[a[i - 1]]++] = i - 1; }); runr(sa, is_type_r, [&](int i) { sa[--S[a[i - 1]]] = i - 1; }); return sa; }; const auto is_lms = [&](int k) { return k > 0 && type[k - 1] == TYPE_L && type[k] == TYPE_S; }; const auto lms = filter(is_lms, seq(n)); const auto next = scanr([is_lms](pair<int, int> a, int acc) { return is_lms(a.second) ? a.second : acc; }, n, pairs(seq(n))); const auto cmp = [&a, &next](int i, int j) { return lexicographical_compare(a.begin() + i, a.begin() + next[i], a.begin() + j, a.begin() + next[j]); }; vector<int> rank(n); run_pairs(filter(is_lms, induced_sort(lms)), [&](int i, int j) { rank[j] = rank[i] + cmp(i, j); }); return induced_sort(mp(lms, suffix_array(mp(rank, lms)))); } void build_lcp() { const int n = a.size(); isa.resize(n + 1); lcp.assign(n + 1, 0); for (int i = 0; i <= n; i++) { isa[sa[i]] = i; } int k = 0; for (int i = 0; i < n; i++) { int j = sa[isa[i] - 1]; k = std::max(0, k - 1); while (i + k < n && j + k < n && a[i + k] == a[j + k]) { k++; } lcp[isa[i] - 1] = k; } } void build_rmq() { const int n = lcp.size(); lg.resize(n + 1); for (int i = 2; i <= n; i++) { lg[i] = lg[i / 2] + 1; } const int m = lg[n]; rmq.assign(m + 1, std::vector<int>(n)); for (int i = 0; i < n; i++) { rmq[0][i] = lcp[i]; } for (int i = 0; i < m; i++) { for (int j = 0; j + (1 << i) < n; j++) { rmq[i + 1][j] = std::min(rmq[i][j], rmq[i][j + (1 << i)]); } } } }; int main() { int n; cin >> n; std::vector<int> start(n); std::vector<int> t; std::vector<int> len(n); for (int i = 0; i < n; i++) { start[i] = t.size(); static char buf[800001]; scanf("%s", buf); int j; for (j = 0; buf[j] != 0; j++) { t.push_back(buf[j]); } len[i] = j; } SuffixDataStructure suf(t); int m; long long x, d; cin >> m >> x >> d; long long ans = 0; const long long N = 1LL * n * (n - 1); while (m--) { int i = x / (n - 1); int j = x % (n - 1); if (i > j) { std::swap(i, j); } else { j = j + 1; } x += d; if (x >= N) { x -= N; } ans += min(suf.get_lcp(start[i], start[j]), min(len[i], len[j])); } std::cout << ans << std::endl; }