結果
問題 | No.2135 C5 |
ユーザー | HIR180 |
提出日時 | 2022-11-28 03:11:58 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,222 ms / 2,000 ms |
コード長 | 6,160 bytes |
コンパイル時間 | 3,105 ms |
コンパイル使用メモリ | 181,272 KB |
実行使用メモリ | 6,824 KB |
最終ジャッジ日時 | 2024-10-04 20:43:04 |
合計ジャッジ時間 | 20,143 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 1,198 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 2 ms
5,248 KB |
testcase_12 | AC | 2 ms
5,248 KB |
testcase_13 | AC | 2 ms
5,248 KB |
testcase_14 | AC | 2 ms
5,248 KB |
testcase_15 | AC | 376 ms
5,248 KB |
testcase_16 | AC | 1,098 ms
5,248 KB |
testcase_17 | AC | 1,184 ms
6,820 KB |
testcase_18 | AC | 901 ms
6,820 KB |
testcase_19 | AC | 5 ms
6,816 KB |
testcase_20 | AC | 309 ms
6,816 KB |
testcase_21 | AC | 10 ms
6,820 KB |
testcase_22 | AC | 54 ms
6,820 KB |
testcase_23 | AC | 1,138 ms
6,816 KB |
testcase_24 | AC | 447 ms
6,820 KB |
testcase_25 | AC | 2 ms
6,820 KB |
testcase_26 | AC | 2 ms
6,820 KB |
testcase_27 | AC | 2 ms
6,820 KB |
testcase_28 | AC | 2 ms
6,820 KB |
testcase_29 | AC | 1,220 ms
6,816 KB |
testcase_30 | AC | 1,221 ms
6,820 KB |
testcase_31 | AC | 1,222 ms
6,824 KB |
testcase_32 | AC | 1,213 ms
6,820 KB |
testcase_33 | AC | 3 ms
6,816 KB |
testcase_34 | AC | 2 ms
6,816 KB |
testcase_35 | AC | 3 ms
6,820 KB |
testcase_36 | AC | 2 ms
6,816 KB |
testcase_37 | AC | 2 ms
6,820 KB |
testcase_38 | AC | 2 ms
6,820 KB |
testcase_39 | AC | 67 ms
6,816 KB |
testcase_40 | AC | 18 ms
6,816 KB |
testcase_41 | AC | 1,219 ms
6,816 KB |
testcase_42 | AC | 3 ms
6,820 KB |
testcase_43 | AC | 2 ms
6,820 KB |
testcase_44 | AC | 2 ms
6,816 KB |
testcase_45 | AC | 582 ms
6,820 KB |
testcase_46 | AC | 4 ms
6,816 KB |
testcase_47 | AC | 198 ms
6,820 KB |
testcase_48 | AC | 2 ms
6,816 KB |
testcase_49 | AC | 1,210 ms
6,820 KB |
testcase_50 | AC | 2 ms
6,816 KB |
testcase_51 | AC | 1,217 ms
6,816 KB |
ソースコード
//Let's join Kaede Takagaki Fan Club !! #pragma GCC optimize("Ofast") #pragma GCC optimize("unroll-loops") #include <cstdio> #include <cstring> #include <cstdlib> #include <cmath> #include <ctime> #include <cassert> #include <string> #include <algorithm> #include <vector> #include <queue> #include <stack> #include <functional> #include <iostream> #include <map> #include <set> //#include <unordered_map> //#include <unordered_set> #include <cassert> #include <iomanip> #include <chrono> #include <random> #include <bitset> #include <complex> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> //#include <atcoder/convolution> //#include <atcoder/lazysegtree> //#include <atcoder/maxflow> //#include <atcoder/mincostflow> //#include <atcoder/segtree> //#include <atcoder/string> using namespace std; //using namespace atcoder; #define int long long //#define L __int128 typedef long long ll; typedef pair<int,int> P; typedef pair<int,P> P1; typedef pair<P,P> P2; #define pu push #define pb push_back #define eb emplace_back #define mp make_pair #define eps 1e-7 #define INF 1000000000 #define a first #define b second #define fi first #define sc second #define rng(i,a,b) for(int i=(int)(a);i<(int)(b);i++) #define rep(i,x) for(int i=0;i<x;i++) #define repn(i,x) for(int i=1;i<=x;i++) #define SORT(x) sort(x.begin(),x.end()) #define ERASE(x) x.erase(unique(x.begin(),x.end()),x.end()) #define POSL(x,v) (lower_bound(x.begin(),x.end(),v)-x.begin()) #define POSU(x,v) (upper_bound(x.begin(),x.end(),v)-x.begin()) #define all(x) x.begin(),x.end() #define si(x) int(x.size()) #define pcnt(x) __builtin_popcountll(x) #ifdef LOCAL #define dmp(x) cerr<<__LINE__<<" "<<#x<<" "<<x<<endl #else #define dmp(x) void(0) #endif template<class t,class u> bool chmax(t&a,u b){if(a<b){a=b;return true;}else return false;} template<class t,class u> bool chmin(t&a,u b){if(b<a){a=b;return true;}else return false;} template<class t> using vc=vector<t>; template<class t,class u> ostream& operator<<(ostream& os,const pair<t,u>& p){ return os<<"{"<<p.fi<<","<<p.sc<<"}"; } template<class t> ostream& operator<<(ostream& os,const vc<t>& v){ os<<"{"; for(auto e:v)os<<e<<","; return os<<"}"; } //https://codeforces.com/blog/entry/62393 struct custom_hash { static uint64_t splitmix64(uint64_t x) { // http://xorshift.di.unimi.it/splitmix64.c x += 0x9e3779b97f4a7c15; x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; x = (x ^ (x >> 27)) * 0x94d049bb133111eb; return x ^ (x >> 31); } size_t operator()(uint64_t x) const { static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); return splitmix64(x + FIXED_RANDOM); } //don't make x negative! size_t operator()(pair<int,int> x)const{ return operator()(uint64_t(x.first)<<32|x.second); } }; //unordered_set -> dtype, null_type //unordered_map -> dtype(key), dtype(value) using namespace __gnu_pbds; template<class t,class u> using hash_table=gp_hash_table<t,u,custom_hash>; template<class T> void o(const T &a,bool space=false){ cout << a << (space?' ':'\n'); } //ios::sync_with_stdio(false); const ll mod = 998244353; //const ll mod = 1000000007; mt19937_64 mt(chrono::steady_clock::now().time_since_epoch().count()); struct modular{ ll v; modular(ll vv=0){s(vv%mod+mod);} modular& s(ll vv){ v=vv<mod?vv:vv-mod; return *this; } modular operator-()const{return modular()-*this;} modular &operator+=(const modular&rhs){return s(v+rhs.v);} modular &operator-=(const modular&rhs){return s(v+mod-rhs.v);} modular &operator*=(const modular&rhs){v=ll(v)*rhs.v%mod;return *this;} modular &operator/=(const modular&rhs){return *this*=rhs.inv();} modular operator+(const modular&rhs)const{return modular(*this)+=rhs;} modular operator-(const modular&rhs)const{return modular(*this)-=rhs;} modular operator*(const modular&rhs)const{return modular(*this)*=rhs;} modular operator/(const modular&rhs)const{return modular(*this)/=rhs;} modular pow(ll n)const{ if(n<0)return inv().pow(-n); modular res(1),x(*this); while(n){ if(n&1)res*=x; x*=x; n>>=1; } return res; } modular inv()const{return pow(mod-2);} friend modular operator+(ll x,const modular&y){ return modular(x)+y; } friend modular operator-(ll x,const modular&y){ return modular(x)-y; } friend modular operator*(ll x,const modular&y){ return modular(x)*y; } friend modular operator/(ll x,const modular&y){ return modular(x)/y; } friend ostream& operator<<(ostream&os,const modular&m){ return os<<m.v; } friend istream& operator>>(istream&is,modular&m){ ll x;is>>x; m=modular(x); return is; } bool operator<(const modular&r)const{return v<r.v;} bool operator==(const modular&r)const{return v==r.v;} bool operator!=(const modular&r)const{return v!=r.v;} explicit operator bool()const{ return v; } }; ll modpow(ll x,ll n){ ll res=1; while(n>0){ if(n&1) res=res*x%mod; x=x*x%mod; n>>=1; } return res; } #define _sz 1005 modular F[_sz],R[_sz]; void make(){ F[0] = 1; for(int i=1;i<_sz;i++) F[i] = F[i-1] * i; R[_sz-1] = F[_sz-1].pow(mod-2); for(int i=_sz-2;i>=0;i--) R[i] = R[i+1] * (i+1); } modular C(int a,int b){ if(b < 0 || a < b) return modular(); return F[a]*R[b]*R[a-b]; } /*int dst(P p, P q){ return (p.a-q.a)*(p.a-q.a)+(p.b-q.b)*(p.b-q.b); }*/ /*template<class t> void add_inplace(t &a, t b){ if(a.size() < b.size()) swap(a, b); for(int i=0;i<b.size();i++){ a[i] += b[i]; if(a[i] < 0) a[i] += mod; if(a[i] >= mod) a[i] -= mod; } return ; }*/ /*template<class t> void ov(const vc<t>&a){ if(a.empty()) return; rep(i, a.size()) cout << a[i] << (i+1==a.size()?'\n':' '); }*/ //o(ans?"Yes":"No"); modular dp[305][305]; void solve(){ int n,m;cin>>n>>m; m=n*(n-1)/2-m; if(m>n){ o(0); return; } make(); dp[0][0]=1; repn(i,n){ rep(j,i+1){ //i, j repn(x, i){ if(j-x+1>=0)dp[i][j]+=dp[i-x][j-x+1]*C(i-1,x-1)*(x==1?1:F[x]/2); if(x>4){ if(j-x>=0)dp[i][j]+=dp[i-x][j-x]*C(i-1,x-1)*F[x-1]/2; } } } } o(dp[n][m]); } signed main(){ cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(20); int t; t = 1; //cin >> t; while(t--) solve(); }