結果
問題 | No.2846 Birthday Cake |
ユーザー | GOTKAKO |
提出日時 | 2024-08-23 22:45:39 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,959 bytes |
コンパイル時間 | 2,609 ms |
コンパイル使用メモリ | 217,556 KB |
実行使用メモリ | 61,796 KB |
最終ジャッジ日時 | 2024-08-23 22:45:58 |
合計ジャッジ時間 | 6,691 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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 | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | TLE | - |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | TLE | - |
testcase_06 | TLE | - |
testcase_07 | AC | 1,754 ms
44,120 KB |
testcase_08 | AC | 1,236 ms
35,200 KB |
testcase_09 | AC | 707 ms
26,564 KB |
testcase_10 | AC | 327 ms
16,896 KB |
testcase_11 | AC | 76 ms
9,344 KB |
testcase_12 | AC | 1,560 ms
48,856 KB |
testcase_13 | AC | 686 ms
34,140 KB |
testcase_14 | AC | 2 ms
6,944 KB |
testcase_15 | AC | 2 ms
6,944 KB |
testcase_16 | AC | 2 ms
6,944 KB |
testcase_17 | AC | 1 ms
6,940 KB |
testcase_18 | AC | 4 ms
6,940 KB |
testcase_19 | AC | 3 ms
6,944 KB |
testcase_20 | AC | 16 ms
6,948 KB |
testcase_21 | AC | 2 ms
6,940 KB |
testcase_22 | AC | 129 ms
9,472 KB |
testcase_23 | AC | 83 ms
8,108 KB |
testcase_24 | AC | 173 ms
16,128 KB |
testcase_25 | AC | 2 ms
6,940 KB |
testcase_26 | AC | 30 ms
6,944 KB |
testcase_27 | AC | 9 ms
6,940 KB |
testcase_28 | AC | 2 ms
6,944 KB |
testcase_29 | AC | 2 ms
6,944 KB |
testcase_30 | AC | 3 ms
6,944 KB |
testcase_31 | AC | 24 ms
6,944 KB |
testcase_32 | AC | 123 ms
9,856 KB |
testcase_33 | AC | 177 ms
16,128 KB |
testcase_34 | AC | 135 ms
12,160 KB |
testcase_35 | AC | 21 ms
6,944 KB |
testcase_36 | AC | 376 ms
20,192 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; struct frac{ //最終的に分子分母64bitに収まる計算のみ. public: long long n,d; frac() : n(0),d(1){} frac(long long v) : n(v),d(1) {} frac(__int128_t a,__int128_t b,bool redu = true){ assert(b != 0); if(redu) reduce(a,b); n = a,d = b; } private: __int128_t gcd(__int128_t a,__int128_t b){ if(a%b == 0) return b; return gcd(b,a%b); } __int128_t gcd128(__int128_t a,__int128_t b){ //絶対値gcd128. if(b == 0) return abs(a); return gcd(abs(a),abs(b)); } void reduce(__int128_t &a,__int128_t &b){ //約分. if(b < 0) a = -a,b = -b; __int128_t div = gcd128(a,b); a /= div; b /= div; } public: //計算量 O(logmax(d,b.d)). friend frac operator+(const frac &b){return b;} friend frac operator-(const frac &b){return frac(-b.n,b.d,false);} friend frac operator+(const frac &a,const frac &b){ return frac((__int128_t)a.n*b.d+(__int128_t)b.n*a.d,(__int128_t)a.d*b.d); } friend frac operator-(const frac &a,const frac &b){ return frac((__int128_t)a.n*b.d-(__int128_t)b.n*a.d,(__int128_t)a.d*b.d); } friend frac operator*(const frac &a,const frac &b){ long long g1 = std::gcd(a.n,b.d),g2 = std::gcd(a.d,b.n); return frac((a.n/g1)*(b.n/g2),(a.d/g2)*(b.d/g1),false); } friend frac operator/(const frac &a,const frac &b){ assert(b.n != 0); long long g1 = std::gcd(a.n,b.n),g2 = std::gcd(a.d,b.d); if(b.n < 0) return frac((-a.n/g1)*(b.d/g2),(a.d/g2)*(-b.n/g1)); else return frac((a.n/g1)*(b.d/g2),(a.d/g2)*(b.n/g1)); } friend bool operator==(const frac &a,const frac &b){return a.n==b.n && a.d==b.d;} friend bool operator!=(const frac &a,const frac &b){return a.n!=b.n || a.d!=b.d;} friend bool operator>(const frac &a,const frac &b){return (__int128_t)a.n*b.d > (__int128_t)b.n*a.d;} friend bool operator>=(const frac &a,const frac &b){return (__int128_t)a.n*b.d >= (__int128_t)b.n*a.d;} friend bool operator<(const frac &a,const frac &b){return (__int128_t)a.n*b.d < (__int128_t)b.n*a.d;} friend bool operator<=(const frac &a,const frac &b){return (__int128_t)a.n*b.d <= (__int128_t)b.n*a.d;} frac &operator=(const frac &b) = default; frac operator+=(const frac &b){return *this=*this+b;} frac operator-=(const frac &b){return *this=*this-b;} frac operator*=(const frac &b){return *this=*this*b;} frac operator/=(const frac &b){return *this=*this/b;} frac operator++(int){*this += frac(1); return *this;} frac operator--(int){*this -= frac(1); return *this;} double decimal(){return (n+0.0)/d;} long double decimall(){return ((long double)n)/d;} long long num(){return n;} long long den(){return d;} long long floor(){return n<0?(n+1)/d-1:n/d;} long long ceil(){return n>0?(n-1)/d+1:n/d;} frac inv(){return frac(n>=0?d:-d,n>=0?n:-n,false);} }; int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); int K,N; cin >> K >> N; vector<__int128_t> fac(K+1); fac.at(0) = 1; for(int i=1; i<=K; i++) fac.at(i) = fac.at(i-1)*i; vector<frac> mindec(K+1); for(int i=1; i<=K; i++) mindec.at(i) = frac(i,N); long long inf = 1000000000; vector<unordered_map<long long,__int128_t>> dp(K+1); dp.at(0)[inf+1] += fac.at(K); for(int i=1; i<=N; i++){ frac dec(1,i); for(int k=K-1; k>=0; k--){ for(auto &[ke,v] : dp.at(k)){ frac now(ke/inf,ke%inf); for(int l=1; l<=K-k; l++){ now -= dec; if(now < 0 || now.d > 20000) break; if(now-mindec.at(K-(k+l)) < 0) break; dp.at(k+l)[now.n*inf+now.d] += v/fac.at(l); } } } } cout << (long long)dp.at(K)[1] << endl; }