結果
問題 | No.1269 I hate Fibonacci Number |
ユーザー |
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提出日時 | 2020-10-23 23:27:57 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,048 bytes |
コンパイル時間 | 1,829 ms |
コンパイル使用メモリ | 124,000 KB |
実行使用メモリ | 33,048 KB |
最終ジャッジ日時 | 2024-07-21 13:24:14 |
合計ジャッジ時間 | 4,162 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 34 WA * 2 |
ソースコード
// #define _GLIBCXX_DEBUG // for STL debug (optional) #include <iostream> #include <iomanip> #include <cstdio> #include <string> #include <cstring> #include <deque> #include <list> #include <queue> #include <stack> #include <vector> #include <utility> #include <algorithm> #include <map> #include <set> #include <complex> #include <cmath> #include <limits> #include <cfloat> #include <climits> #include <ctime> #include <cassert> #include <numeric> #include <fstream> #include <functional> #include <bitset> using namespace std; using ll = long long int; using int64 = long long int; template<typename T> void chmax(T &a, T b) {a = max(a, b);} template<typename T> void chmin(T &a, T b) {a = min(a, b);} template<typename T> void chadd(T &a, T b) {a = a + b;} int dx[] = {0, 0, 1, -1}; int dy[] = {1, -1, 0, 0}; const int INF = 1LL << 29; const ll LONGINF = 1LL << 60; const ll MOD = 1000000007LL; void test() { vector<ll> fib(2, 1); for(int i=2; ; i++) { ll nxt_fib = fib[i-1] + fib[i-2]; if(nxt_fib > (ll)1e18) break; else { fprintf(stderr, "fib[%d] = %lld\n", i, nxt_fib); fib.emplace_back(nxt_fib); } } } // ModInt begin using ll = long long; template<ll mod> struct ModInt { ll v; ll mod_pow(ll x, ll n) const { return (!n) ? 1 : (mod_pow((x*x)%mod,n/2) * ((n&1)?x:1)) % mod; } ModInt(ll a = 0) : v((a %= mod) < 0 ? a + mod : a) {} ModInt operator+ ( const ModInt& b ) const { return (v + b.v >= mod ? ModInt(v + b.v - mod) : ModInt(v + b.v)); } ModInt operator- () const { return ModInt(-v); } ModInt operator- ( const ModInt& b ) const { return (v - b.v < 0 ? ModInt(v - b.v + mod) : ModInt(v - b.v)); } ModInt operator* ( const ModInt& b ) const {return (v * b.v) % mod;} ModInt operator/ ( const ModInt& b ) const {return (v * mod_pow(b.v, mod-2)) % mod;} bool operator== ( const ModInt &b ) const {return v == b.v;} bool operator!= ( const ModInt &b ) const {return !(*this == b); } ModInt& operator+= ( const ModInt &b ) { v += b.v; if(v >= mod) v -= mod; return *this; } ModInt& operator-= ( const ModInt &b ) { v -= b.v; if(v < 0) v += mod; return *this; } ModInt& operator*= ( const ModInt &b ) { (v *= b.v) %= mod; return *this; } ModInt& operator/= ( const ModInt &b ) { (v *= mod_pow(b.v, mod-2)) %= mod; return *this; } ModInt pow(ll x) { return ModInt(mod_pow(v, x)); } // operator int() const { return int(v); } // operator long long int() const { return v; } }; template<ll mod> ModInt<mod> pow(ModInt<mod> n, ll k) { return ModInt<mod>(n.mod_pow(n.v, k)); } template<ll mod> ostream& operator<< (ostream& out, ModInt<mod> a) {return out << a.v;} template<ll mod> istream& operator>> (istream& in, ModInt<mod>& a) { in >> a.v; return in; } // ModInt end using mint = ModInt<MOD>; int nxt_state[750][10]; mint dp[5010][750]; int main() { // test(); ll N, L, R; cin >> N >> L >> R; vector<string> pfx; auto add_str = [&](string pat) { if(stoll(pat) < L) return; if(R < stoll(pat)) return; for(int i=0; i<=(int)pat.size(); i++) { pfx.emplace_back(pat.substr(0, i)); } }; add_str("1"); vector<ll> fib(2, 1); for(int i=2; ; i++) { ll nxt_fib = fib[i-1] + fib[i-2]; if(nxt_fib > (ll)1e18) break; else { add_str(to_string(nxt_fib)); fib.emplace_back(nxt_fib); } } sort(pfx.begin(), pfx.end()); pfx.erase(unique(pfx.begin(), pfx.end()), pfx.end()); int M = pfx.size(); vector<int> ng_state(M, false); for(int i=0; i<M; i++) { for(int k=1; k<(int)fib.size(); k++) { if(fib[k] < L or R < fib[k]) continue; string t = to_string(fib[k]); int lenA = t.length(); int lenB = pfx[i].length(); if(lenA <= lenB) { if(pfx[i].substr(lenB - lenA, lenA) == t) { ng_state[i] = true; } } } for(int c=0; c<10; c++) { string s = pfx[i] + (char)('0' + c); int k; while(true) { k = lower_bound(pfx.begin(), pfx.end(), s) - pfx.begin(); if(k < M and pfx[k] == s) break; s = s.substr(1); } nxt_state[i][c] = k; } } dp[0][0] = mint(1); for(int i=0; i<N; i++) { for(int j=0; j<M; j++) { for(int k=0; k<10; k++) { int nj = nxt_state[j][k]; if(ng_state[j] or ng_state[nj]) continue; dp[i+1][nj] += dp[i][j]; } } } mint ans(-1); for(int i=0; i<M; i++) { ans += dp[N][i]; } cout << ans << endl; return 0; }