結果
問題 |
No.1269 I hate Fibonacci Number
|
ユーザー |
|
提出日時 | 2020-10-23 23:57:06 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 205 ms / 3,000 ms |
コード長 | 3,499 bytes |
コンパイル時間 | 1,107 ms |
コンパイル使用メモリ | 105,784 KB |
最終ジャッジ日時 | 2025-01-15 14:25:41 |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 36 |
ソースコード
#include <iostream> #include <algorithm> #include <numeric> #include <vector> #include <string> #include <array> #include <queue> #include <functional> #include <atcoder/modint> template <int K, class T> struct PatternsMatching { struct Node { std::array<int, K> nxt; int fail; bool matched; explicit Node() : fail(0), matched(false) { nxt.fill(-1); } }; std::vector<Node> nodes; std::function<int(T)> enc; explicit PatternsMatching(T base) { nodes.emplace_back(); enc = [=](T c) { return c - base; }; } template <class Container> void add(const Container& s) { int pos = 0; for (T ci : s) { int c = enc(ci); int npos = nodes[pos].nxt[c]; if (npos == -1) { npos = nodes.size(); nodes[pos].nxt[c] = npos; nodes.emplace_back(); } pos = npos; } nodes[pos].matched = true; } void build() { std::queue<int> que; for (int& pos : nodes[0].nxt) { if (pos == -1) { pos = 0; } else { que.push(pos); } } while (!que.empty()) { int pos = que.front(); que.pop(); for (int c = 0; c < K; ++c) { int npos = nodes[pos].nxt[c]; if (npos == -1) continue; int p = nodes[pos].fail; while (nodes[p].nxt[c] == -1) p = nodes[p].fail; int fpos = next(nodes[pos].fail, c); nodes[npos].fail = fpos; if (nodes[fpos].matched) nodes[npos].matched = true; que.push(npos); } } } int next(int pos, int c) const { while (nodes[pos].nxt[c] == -1) pos = nodes[pos].fail; return nodes[pos].nxt[c]; } // (id, end of matching) template <class Container> std::vector<std::pair<int, int>> matching(const Container& s) const { std::vector<std::pair<int, int>> ret; int pos = 0; for (int i = 0; i < (int)s.size(); ++i) { pos = next(pos, enc(s[i])); for (auto id : nodes[pos].ids) { ret.emplace_back(id, i + 1); } } return ret; } Node& operator[](int pos) { return nodes[pos]; } Node operator[](int pos) const { return nodes[pos]; } }; using lint = long long; using mint = atcoder::modint1000000007; void solve() { int n; lint l, r; std::cin >> n >> l >> r; PatternsMatching<10, char> pm('0'); { lint a = 1, b = 1; while (a <= r) { if (l <= a && a <= r) pm.add(std::to_string(a)); lint s = a + b; b = a; a = s; } } pm.build(); int m = pm.nodes.size(); std::vector<mint> dp(m, 0); dp[0] = 1; auto ndp = dp; while (n--) { std::fill(ndp.begin(), ndp.end(), 0); for (int i = 0; i < m; ++i) { for (int d = 0; d < 10; ++d) { int j = pm.next(i, d); if (pm.nodes[j].matched) continue; ndp[j] += dp[i]; } } std::swap(dp, ndp); } std::cout << (std::accumulate(dp.begin(), dp.end(), mint(0)) - 1).val() << "\n"; } int main() { std::cin.tie(nullptr); std::ios::sync_with_stdio(false); solve(); return 0; }