結果
問題 | No.1428 PeRmutation Question |
ユーザー | n_vip |
提出日時 | 2021-03-12 22:55:12 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 7,701 bytes |
コンパイル時間 | 1,377 ms |
コンパイル使用メモリ | 142,536 KB |
実行使用メモリ | 17,536 KB |
最終ジャッジ日時 | 2024-10-14 13:29:29 |
合計ジャッジ時間 | 4,249 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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 | 48 ms
16,256 KB |
testcase_01 | WA | - |
testcase_02 | AC | 50 ms
16,256 KB |
testcase_03 | WA | - |
testcase_04 | AC | 48 ms
16,384 KB |
testcase_05 | AC | 50 ms
16,384 KB |
testcase_06 | AC | 49 ms
16,384 KB |
testcase_07 | WA | - |
testcase_08 | AC | 49 ms
16,384 KB |
testcase_09 | WA | - |
testcase_10 | AC | 51 ms
16,384 KB |
testcase_11 | WA | - |
testcase_12 | AC | 55 ms
16,640 KB |
testcase_13 | AC | 58 ms
17,280 KB |
testcase_14 | AC | 58 ms
17,152 KB |
testcase_15 | AC | 54 ms
17,024 KB |
testcase_16 | AC | 59 ms
17,536 KB |
testcase_17 | AC | 60 ms
17,536 KB |
testcase_18 | AC | 53 ms
16,896 KB |
testcase_19 | AC | 51 ms
16,640 KB |
testcase_20 | AC | 53 ms
16,656 KB |
testcase_21 | AC | 60 ms
17,360 KB |
testcase_22 | AC | 63 ms
17,408 KB |
testcase_23 | AC | 61 ms
17,492 KB |
testcase_24 | AC | 60 ms
17,536 KB |
testcase_25 | AC | 58 ms
17,280 KB |
testcase_26 | AC | 57 ms
17,280 KB |
testcase_27 | AC | 61 ms
17,536 KB |
testcase_28 | AC | 59 ms
17,280 KB |
testcase_29 | AC | 58 ms
17,536 KB |
testcase_30 | AC | 59 ms
17,408 KB |
testcase_31 | AC | 57 ms
17,536 KB |
testcase_32 | AC | 58 ms
17,536 KB |
ソースコード
#include <string> #include <vector> #include<iostream> #include<cstdio> #include<cstdlib> #include<stack> #include<queue> #include<cmath> #include<algorithm> #include<functional> #include<list> #include<deque> #include<bitset> #include<set> #include<map> #include<unordered_map> #include<unordered_set> #include<cstring> #include<sstream> #include<complex> #include<iomanip> #include<numeric> #include<cassert> #include<random> #define X first #define Y second #define pb push_back #define rep(X,Y) for (int (X) = 0;(X) < (int)(Y);++(X)) #define reps(X,S,Y) for (int (X) = (int)(S);(X) < (int)(Y);++(X)) #define rrep(X,Y) for (int (X) = (int)(Y)-1;(X) >=0;--(X)) #define rreps(X,S,Y) for (int (X) = (int)(Y)-1;(X) >= (int)(S);--(X)) #define repe(X,Y) for ((X) = 0;(X) < (Y);++(X)) #define peat(X,Y) for (;(X) < (Y);++(X)) #define all(X) (X).begin(),(X).end() #define rall(X) (X).rbegin(),(X).rend() #define eb emplace_back #define UNIQUE(X) (X).erase(unique(all(X)),(X).end()) #define Endl endl #define NL <<"\n" #define cauto const auto using namespace std; using ll=long long; using pii=pair<int,int>; using pll=pair<ll,ll>; template<class T> using vv=vector<vector<T>>; template<class T> inline bool MX(T &l,const T &r){return l<r?l=r,1:0;} template<class T> inline bool MN(T &l,const T &r){return l>r?l=r,1:0;} //#undef NUIP #ifdef NUIP #include "benri.h" #else #define out(args...) #endif void ouT(ll x,int d=3){auto re=to_string(x);if((int)re.size()>d) re=x>0?"oo":"-oo";cout<<string(d-re.size(),' ')<<re<<",";} #ifdef __cpp_init_captures template<typename T>vector<T> table(int n, T v){ return vector<T>(n, v);} template <class... Args> auto table(int n, Args... args){auto val = table(args...); return vector<decltype(val)>(n, move(val));} #endif template<class A,class B> pair<A,B> operator+(const pair<A,B> &p,const pair<A,B> &q){ return {p.X+q.X,p.Y+q.Y};} template<class A,class B,class C,class D> pair<A,B>& operator+=(pair<A,B> &p,const pair<C,D> &q){ p.X+=q.X; p.Y+=q.Y; return p;} template<class A,class B> pair<A,B> operator-(const pair<A,B> &p,const pair<A,B> &q){ return {p.X-q.X,p.Y-q.Y};} template<class A,class B,class C,class D> pair<A,B>& operator-=(pair<A,B> &p,const pair<C,D> &q){ p.X-=q.X; p.Y-=q.Y; return p;} template<class A,class B> istream& operator>>(istream &is, pair<A,B> &p){ is>>p.X>>p.Y; return is;} template<class T=ll> T read(){ T re; cin>>re; return move(re);} template<class T=ll> T read(const T &dec){ T re; cin>>re; return re-dec;} template<class T=ll> vector<T> readV(const int sz){ vector<T> re(sz); for(auto &x:re) x=read<T>(); return move(re);} template<class T=ll> vector<T> readV(const int sz, const T &dec){ vector<T> re(sz); for(auto &x:re) x=read<T>(dec); return move(re);} vv<int> readG(const int &n,const int &m){ vv<int> g(n); rep(_,m){ cauto a=read<int>(1),b=read<int>(1); g[a].pb(b); g[b].pb(a);} return move(g);} vv<int> readG(const int &n){ return readG(n,n-1);} #define TT cauto TTT=read();rep(_,TTT) const ll MOD=1e9+7; //998244353; ll modpow_(ll r,ll n,ll m=MOD){ ll re=1,d=r%m; if(n<0)(n%=m-1)+=m-1; for(;n;n/=2){ if(n&1)(re*=d)%=m; (d*=d)%=m; } return re; } template <int mod=MOD> struct ModInt{ int v; ModInt(int v=0):v(v){} ModInt operator+(const ModInt &n)const{return v+n.v<mod ? v+n.v : v+n.v-mod;} ModInt operator-(const ModInt &n)const{return v-n.v<0 ? v-n.v+mod : v-n.v;} ModInt operator*(const ModInt &n)const{return ll(v)*n.v%mod;} ModInt operator/(const ModInt &n)const{return ll(v)*modpow_(n.v%mod,-1,mod)%mod;} ModInt operator+(const ll &n)const{return v+n<mod ? v+n : v+n-mod;} ModInt operator-(const ll &n)const{return v-n<0 ? v-n+mod : v-n;} ModInt operator*(const ll &n)const{return ll(v)*(n%mod)%mod;} ModInt operator/(const ll &n)const{return ll(v)*modpow_(n%mod,-1,mod)%mod;} ModInt& operator+=(const ModInt &n){v+=n.v; if(v>=mod) v-=mod; return *this;} ModInt& operator-=(const ModInt &n){v-=n.v; if(v<0) v+=mod; return *this;} ModInt& operator*=(const ModInt &n){v=ll(v)*n.v%mod; return *this;} ModInt& operator/=(const ModInt &n){v=ll(v)*modpow_(n.v,-1,mod)%mod; return *this;} ModInt& operator+=(const ll &n){v+=n; if(v>=mod) v-=mod; return *this;} ModInt& operator-=(const ll &n){v-=n; if(v<0) v+=mod; return *this;} ModInt& operator*=(const ll &n){v=ll(v)*n%mod; return *this;} ModInt& operator/=(const ll &n){v=ll(v)*modpow_(n,-1,mod)%mod; return *this;} bool operator==(const ModInt &n)const{return v==n.v;}; bool operator!=(const ModInt &n)const{return v!=n.v;}; ModInt& operator++(){ return operator+=(1); } ModInt& operator--(){ return operator-=(1); } ModInt operator++(int i){ ModInt tmp(*this); operator++(); return tmp; } ModInt operator--(int i){ ModInt tmp(*this); operator--(); return tmp; } }; #ifdef NUIP class MINT_FRAC____{ public: unordered_map<int,pii> dict; MINT_FRAC____(int n){ rep(p,n+1)reps(q,1,n+1)if(__gcd(p,q)==1){ dict[1ll*p*modpow_(q,-1)%MOD]=pii(p,q); dict[MOD-1ll*p*modpow_(q,-1)%MOD]=pii(-p,q); } } } Il1Il1Il1(1000); template<int mod> ostream& operator<<(ostream &os,const ModInt<mod> &n){if(Il1Il1Il1.dict.count(n.v)) os<<n.v<<"("<<Il1Il1Il1.dict[n.v].X<<"/"<<Il1Il1Il1.dict[n.v].Y<<")";else os<<n.v;return os;}; #else template<int mod> ostream& operator<<(ostream &os,const ModInt<mod> &n){return os<<n.v;}; #endif template<int mod> ModInt<mod> operator+(const ll &n,const ModInt<mod> &m){return m.v+n<mod ? m.v+n : m.v+n-mod;} template<int mod> ModInt<mod> operator-(const ll &n,const ModInt<mod> &m){return n-m.v<0 ? n-m.v+mod : n-m.v;} template<int mod> ModInt<mod> operator*(const ll &n,const ModInt<mod> &m){return ll(m.v)*(n%mod)%mod;} template<int mod> ModInt<mod> operator/(const ll &n,const ModInt<mod> &m){return ModInt<mod>(n%mod)/m;} typedef ModInt<MOD> mint; template <int mod> ModInt<mod> modpow(ModInt<mod> r,ll n){ ModInt<mod> re(1); if(n<0)(n%=mod-1)+=mod-1; for(;n;n/=2){if(n&1) re*=r; r*=r;} return re;} vector<mint> fact,finv,inv; mint comb(ll n,ll r){ if(n<r||r<0)return 0; return fact[n]*finv[n-r]*finv[r];} class Doralion{ void Modinvs(vector<mint> &re,int n){ re.resize(n+1); re[1]=1; for(int i=2;i<=n;++i)re[i]=re[MOD%i]*(MOD-MOD/i);} void Facts(vector<mint> &re,int n){ re.resize(n+1); re[0]=1; rep(i,n)re[i+1]=re[i]*(i+1);} void Factinvs(vector<mint> &re,const vector<mint> &inv,int n){ re.resize(n+1); re[0]=1; rep(i,n)re[i+1]=re[i]*inv[i+1];} public: Doralion(int n){ Modinvs(inv,n); Facts(fact,n); Factinvs(finv,inv,n);} } doralion(1123456); using pmm=pair<mint,mint>; mint modpow(ll r,ll n){ return modpow_(r,n);} struct UF{ vector<int> data; UF(const int &size):data(size,-1){} int unite(int x, int y){ x=root(x); y=root(y); if(x==y) return 0; if(-data[y]>-data[x]) swap(x,y); data[x]+=data[y]; data[y]=x; return y+1; } bool findSet(const int &x, const int &y){ return root(x)==root(y);} int root(const int &x){ return data[x]<0?x:data[x]=root(data[x]);} int size(const int &x){ return -data[root(x)];} int size(){ return count_if(all(data),[](const int &x){ return x<0;});}; //unverified int operator()(const int &x, const int &y){ return unite(x,y);} int operator()(const pii &xy){ return unite(xy.X,xy.Y);} int operator[](const int &x){ return root(x);} bool operator[](const pii &xy){ return findSet(xy.X,xy.Y);} }; int main(){ ios_base::sync_with_stdio(false); cin.tie(0); cout<<fixed<<setprecision(0); cauto n=read(); cauto ps=readV(n,1); UF uf(n); rep(i,n) uf(i,ps[i]); vector<int> cnt(n+1); rep(i,n)if(uf[i]==i) ++cnt[uf.size(i)]; int sgn=0; rep(i,n)if(i%2==0) sgn+=cnt[i]; mint re=fact[n]; rep(i,n+1){ rep(_,cnt[i]) re*=inv[i]; re*=finv[cnt[i]]; } if(sgn==0) re/=2; cout<<re NL; return 0; }