結果

問題 No.2846 Birthday Cake
コンテスト
ユーザー shobonvip
提出日時 2024-08-23 21:53:15
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 462 ms / 2,000 ms
コード長 2,121 bytes
コンパイル時間 2,089 ms
コンパイル使用メモリ 209,348 KB
最終ジャッジ日時 2025-02-23 23:42:03
ジャッジサーバーID
（参考情報） 		judge2 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 34
権限があれば一括ダウンロードができます

ソースコード

diff # 

#include<bits/stdc++.h>
using namespace std;

//#include<atcoder/all>
//using namespace atcoder;
//typedef modint998244353 mint;
typedef long long ll;
#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	int k, n; cin >> k >> n;

	if (n <= 17){
		vector<ll> mxg(n+1, 1);
		rep(i,0,n) mxg[i+1] = mxg[i]/__gcd(mxg[i], (ll)(i+1))*(i+1);
		vector<ll> v(n+1, 0);
		rep(i,1,n+1) v[i] = mxg[n]/i;
		vector<map<ll,ll>> a(n+1);
		a[0][0]=1;
		rep(i,0,n){
			for(auto[j,c]:a[i]){
				rrep(x,1,n+1){
					if(j+v[x]>mxg[n])break;
					a[i+1][j+v[x]]+=c;
				}
			}
		}
		cout << a[k][mxg[n]] << endl;
	}else{
		vector<vector<ll>> tar;
		tar.resize(25);
		tar[18] = {0,1,1,10,143,1321,12612,98967,706351,4519408,23098446,90446137,233499344,359830680,303875573,120897041,15574653,61864,1,};
		tar[19] = {0,1,1,10,143,1321,12612,98967,706351,4519408,23098446,90446137,233499344,359830680,303875573,120897041,15574653,61864,1,1,};
		tar[20] = {0,1,1,10,167,1851,20562,188049,1637057,12442024,81943326,429039909,1740647525,5233214351,10843887965,14088489255,9982510305,2962502213,198795808,582085,1,};
		tar[21] = {0,1,1,10,167,2001,23622,247899,2492121,23603800,200197566,1457497196,8592067529,39580212205,134817405451,309930637885,426337329317,295288749243,73152855670,6996250795,28282071,1,};
		tar[22] = {0,1,1,10,167,2001,23622,247941,2492905,23625220,200631786,1464757108,8683726163,40413510762,140147181266,332462625610,484295650621,382283766495,146218113382,38473778130,5684671181,173183578,1,};
		tar[23] = {0,1,1,10,167,2001,23622,247941,2492905,23625220,200631786,1464757108,8683726163,40413510762,140147181266,332462625610,484295650621,382283766495,146218113382,38473778130,5684671181,173183578,1,1};
		tar[24] = {0,1,1,10,191,2511,33882,409165,4641625,50103058,496822401,4403064282,33370486316,209225931487,1051662957619,4048971290390,11244715040211,20694326612398,22228226842243,11390082915896,2186175253228,151220665303,2381965422,1643558,1,};
		cout << tar[n][k] << endl;
	}
}
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