結果
問題 | No.1392 Don't be together |
ユーザー | akua |
提出日時 | 2023-04-19 22:14:22 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,920 ms / 2,000 ms |
コード長 | 6,468 bytes |
コンパイル時間 | 6,047 ms |
コンパイル使用メモリ | 235,836 KB |
実行使用メモリ | 35,328 KB |
最終ジャッジ日時 | 2024-11-15 04:17:44 |
合計ジャッジ時間 | 41,630 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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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 | 156 ms
34,544 KB |
testcase_01 | AC | 157 ms
34,560 KB |
testcase_02 | AC | 157 ms
34,432 KB |
testcase_03 | AC | 157 ms
34,560 KB |
testcase_04 | AC | 157 ms
34,468 KB |
testcase_05 | AC | 158 ms
34,560 KB |
testcase_06 | AC | 1,476 ms
35,328 KB |
testcase_07 | AC | 1,917 ms
35,328 KB |
testcase_08 | AC | 1,852 ms
35,316 KB |
testcase_09 | AC | 1,441 ms
35,212 KB |
testcase_10 | AC | 1,916 ms
35,200 KB |
testcase_11 | AC | 1,916 ms
35,200 KB |
testcase_12 | AC | 1,913 ms
35,328 KB |
testcase_13 | AC | 1,916 ms
35,328 KB |
testcase_14 | AC | 1,918 ms
35,216 KB |
testcase_15 | AC | 1,919 ms
35,328 KB |
testcase_16 | AC | 1,919 ms
35,220 KB |
testcase_17 | AC | 1,917 ms
35,328 KB |
testcase_18 | AC | 1,920 ms
35,328 KB |
testcase_19 | AC | 1,917 ms
35,188 KB |
testcase_20 | AC | 694 ms
35,072 KB |
testcase_21 | AC | 335 ms
34,816 KB |
testcase_22 | AC | 1,347 ms
35,200 KB |
testcase_23 | AC | 866 ms
35,108 KB |
testcase_24 | AC | 789 ms
34,944 KB |
testcase_25 | AC | 961 ms
34,944 KB |
testcase_26 | AC | 357 ms
34,920 KB |
testcase_27 | AC | 659 ms
34,888 KB |
testcase_28 | AC | 834 ms
35,072 KB |
testcase_29 | AC | 502 ms
34,816 KB |
ソースコード
#pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include <atcoder/all> #include <iostream> // cout, endl, cin #include <string> // string, to_string, stoi #include <vector> // vector #include <algorithm> // min, max, swap, sort, reverse, lower_bound, upper_bound #include <utility> // pair, make_pair #include <tuple> // tuple, make_tuple #include <cstdint> // int64_t, int*_t #include <cstdio> // printf #include <map> // map #include <queue> // queue, priority_queue #include <set> // set #include <stack> // stack #include <deque> // deque #include <unordered_map> // unordered_map #include <unordered_set> // unordered_set #include <bitset> // bitset #include <cctype> // isupper, islower, isdigit, toupper, tolower #include <math.h> #include <iomanip> #include <functional> using namespace std; using namespace atcoder; #define rep(i, n) for (int i = 0; i < (int)(n); i++) #define repi(i, a, b) for (int i = (int)(a); i < (int)(b); i++) typedef long long ll; typedef unsigned long long ull; const ll inf=1e18; using graph = vector<vector<int> > ; using P= pair<ll,ll>; using vi=vector<int>; using vvi=vector<vi>; using vll=vector<ll>; using vvll=vector<vll>; using vp=vector<P>; using vvp=vector<vp>; using vd=vector<double>; using vvd =vector<vd>; //string T="ABCDEFGHIJKLMNOPQRSTUVWXYZ"; //string S="abcdefghijklmnopqrstuvwxyz"; //g++ main.cpp -std=c++17 -I . //cout <<setprecision(20); //cout << fixed << setprecision(10); //cin.tie(0); ios::sync_with_stdio(false); const double PI = acos(-1); int vx[]={0,1,0,-1,-1,1,1,-1},vy[]={1,0,-1,0,1,1,-1,-1}; void putsYes(bool f){cout << (f?"Yes":"No") << endl;} void putsYES(bool f){cout << (f?"YES":"NO") << endl;} void putsFirst(bool f){cout << (f?"First":"Second") << endl;} void debug(int test){cout << "TEST" << " " << test << endl;} ll pow_pow(ll x,ll n,ll mod){ if(n==0) return 1; x%=mod; ll res=pow_pow(x*x%mod,n/2,mod); if(n&1)res=res*x%mod; return res; } ll gcd(ll x,ll y){ if(y==0)return x; return gcd(y,x%y); } ll lcm(ll x,ll y){ return ll(x/gcd(x,y))*y; } template<class T> bool chmin(T& a, T b) { if (a > b) { a = b; return true; } else return false; } template<class T> bool chmax(T& a, T b) { if (a < b) { a = b; return true; } else return false; } // https://youtu.be/L8grWxBlIZ4?t=9858 // https://youtu.be/ERZuLAxZffQ?t=4807 : optimize // https://youtu.be/8uowVvQ_-Mo?t=1329 : division ll mod =998244353; //ll mod =1e9+7; struct mint { ll x; // typedef long long ll; mint(ll x=0):x((x%mod+mod)%mod){} mint operator-() const { return mint(-x);} mint& operator+=(const mint a) { if ((x += a.x) >= mod) x -= mod; return *this; } mint& operator-=(const mint a) { if ((x += mod-a.x) >= mod) x -= mod; return *this; } mint& operator*=(const mint a) { (x *= a.x) %= mod; return *this;} mint operator+(const mint a) const { return mint(*this) += a;} mint operator-(const mint a) const { return mint(*this) -= a;} mint operator*(const mint a) const { return mint(*this) *= a;} mint pow(ll t) const { if (!t) return 1; mint a = pow(t>>1); a *= a; if (t&1) a *= *this; return a; } // for prime mod mint inv() const { return pow(mod-2);} mint& operator/=(const mint a) { return *this *= a.inv();} mint operator/(const mint a) const { return mint(*this) /= a;} }; istream& operator>>(istream& is, const mint& a) { return is >> a.x;} ostream& operator<<(ostream& os, const mint& a) { return os << a.x;} // combination mod prime // https://www.youtube.com/watch?v=8uowVvQ_-Mo&feature=youtu.be&t=1619 struct combination { vector<mint> fact, ifact; combination(int n):fact(n+1),ifact(n+1) { //assert(n < mod); fact[0] = 1; for (int i = 1; i <= n; ++i) fact[i] = fact[i-1]*i; ifact[n] = fact[n].inv(); for (int i = n; i >= 1; --i) ifact[i-1] = ifact[i]*i; } mint operator()(int n, int k) { if (k < 0 || k > n) return 0; if (n<0) return 0; return fact[n]*ifact[k]*ifact[n-k]; } mint p(int n, int k) { return fact[n]*ifact[n-k]; } } c(2000000); using vm=vector<mint> ; using vvm=vector<vm> ; struct edge{ int to; ll cost; edge(int to,ll cost) : to(to),cost(cost){} }; using ve=vector<edge>; using vve=vector<ve>; struct Compress{ vll a; map<ll,ll> d,d2; int cnt; Compress() :cnt(0) {} void add(ll x){a.push_back(x);} void init(){ set<ll>s(a.begin(),a.end()); for(auto y:s)d[y]=cnt++; for(auto&y:a)y=d[y]; for(auto u:d)d2[u.second]=u.first; } ll to(ll x){return d[x];} //変換先 ll from(ll x){return d2[x];}//逆引き int size(){return cnt;} }; //vll anss; vll anss; struct UnionFind { vector<int> par, siz; UnionFind(int n) : par(n, -1) , siz(n, 1) { } int root(int x) { if (par[x] == -1) return x; else return par[x] = root(par[x]); } bool issame(int x, int y) { return root(x) == root(y); } bool unite(int x, int y) { x = root(x), y = root(y); if (x == y) return false; if (siz[x] < siz[y]) swap(x, y); par[y] = x; siz[x] += siz[y]; return true; } int size(int x) { return siz[root(x)]; } }; const int N=5005; //mint dp[N][N][2]; void solve(int test){ int n,m; cin >> n >> m; UnionFind uf(n); vi p(n);rep(i,n)cin >> p[i],p[i]--; rep(i,n)uf.unite(i,p[i]); int tot=0; vvm dp; rep(x,n)if(x==uf.root(x)){ int si=uf.size(x); // rep(i,si+1)rep(j,si+1)rep(k,2)dp[i][j][k]=0; if(tot==0){ dp.resize(2,vm(2)); dp[1][1]=1; } else { vvm next(dp.size()+1,vm(2)); rep(i,dp.size())rep(j,2){ next[i][1]+=dp[i][j]*i; next[i+1][1]+=dp[i][j]; } swap(next,dp); } repi(i,1,si){ vvm next(dp.size()+1,vm(2)); rep(j,dp.size())rep(k,2){ mint now=dp[j][k]; if(!now.x)continue; { next[j+1][0]+=now; } { if(k){ next[j][0]+=now*(j-1); } else { next[j][0]+=now*(j-2); if(i!=si-1)next[j][1]+=now; } } } swap(next,dp); } tot+=si; } cout << dp[m][0]+dp[m][1] << endl; } //g++ main.cpp -std=c++17 -I . int main(){cin.tie(0);ios::sync_with_stdio(false); int t=1;//cin >> t; rep(test,t)solve(test); for(auto u:anss)cout << u << endl; }