結果
問題 | No.1392 Don't be together |
ユーザー |
![]() |
提出日時 | 2020-09-01 22:58:36 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 802 ms / 2,000 ms |
コード長 | 13,993 bytes |
コンパイル時間 | 3,033 ms |
コンパイル使用メモリ | 216,692 KB |
最終ジャッジ日時 | 2025-01-14 03:20:20 |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 27 |
コンパイルメッセージ
main.cpp: In function ‘void scan(int&)’: main.cpp:85:25: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 85 | void scan(int& a){ scanf("%d", &a); } | ~~~~~^~~~~~~~~~ main.cpp: In function ‘void scan(unsigned int&)’: main.cpp:86:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 86 | void scan(unsigned& a){ scanf("%u", &a); } | ~~~~~^~~~~~~~~~ main.cpp: In function ‘void scan(long int&)’: main.cpp:87:26: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 87 | void scan(long& a){ scanf("%ld", &a); } | ~~~~~^~~~~~~~~~~ main.cpp: In function ‘void scan(long long int&)’: main.cpp:88:31: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 88 | void scan(long long& a){ scanf("%lld", &a); } | ~~~~~^~~~~~~~~~~~ main.cpp: In function ‘void scan(long long unsigned int&)’: main.cpp:89:40: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 89 | void scan(unsigned long long& a){ scanf("%llu", &a); } | ~~~~~^~~~~~~~~~~~ main.cpp: In function ‘void scan(float&)’: main.cpp:91:27: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 91 | void scan(float& a){ scanf("%f", &a); } | ~~~~~^~~~~~~~~~ main.cpp: In function ‘void scan(double&)’: main.cpp:92:28: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result
ソースコード
#include <bits/stdc++.h>using namespace std;using ll = long long;using ld = long double;using ull = unsigned long long;using uint = unsigned;using pcc = pair<char, char>;using pii = pair<int, int>;using pll = pair<ll, ll>;using pdd = pair<ld, ld>;using tuplis = array<ll, 3>;template<class T> using pq = priority_queue<T, vector<T>, greater<T>>;const ll LINF=0x1fffffffffffffff;const ll MINF=0x7fffffffffff;const int INF=0x3fffffff;const int MOD=1000000007;const int MODD=998244353;const ld DINF=numeric_limits<ld>::infinity();const ld EPS=1e-9;const ld PI=3.1415926535897932;const ll dx[] = {0, 1, 0, -1, 1, -1, 1, -1};const ll dy[] = {1, 0, -1, 0, 1, 1, -1, -1};#define overload4(_1,_2,_3,_4,name,...) name#define overload3(_1,_2,_3,name,...) name#define rep1(n) for(ll i=0;i<n;++i)#define rep2(i,n) for(ll i=0;i<n;++i)#define rep3(i,a,b) for(ll i=a;i<b;++i)#define rep4(i,a,b,c) for(ll i=a;i<b;i+=c)#define rep(...) overload4(__VA_ARGS__,rep4,rep3,rep2,rep1)(__VA_ARGS__)#define rrep1(n) for(ll i=n;i--;)#define rrep2(i,n) for(ll i=n;i--;)#define rrep3(i,a,b) for(ll i=b;i-->(a);)#define rrep4(i,a,b,c) for(ll i=(a)+((b)-(a)-1)/(c)*(c);i>=(a);i-=c)#define rrep(...) overload4(__VA_ARGS__,rrep4,rrep3,rrep2,rrep1)(__VA_ARGS__)#define each1(i,a) for(auto&&i:a)#define each2(x,y,a) for(auto&&[x,y]:a)#define each3(x,y,z,a) for(auto&&[x,y,z]:a)#define each(...) overload4(__VA_ARGS__,each3,each2,each1)(__VA_ARGS__)#define all1(i) begin(i),end(i)#define all2(i,a) begin(i),begin(i)+a#define all3(i,a,b) begin(i)+a,begin(i)+b#define all(...) overload3(__VA_ARGS__,all3,all2,all1)(__VA_ARGS__)#define rall1(i) (i).rbegin(),(i).rend()#define rall2(i,k) (i).rbegin(),(i).rbegin()+k#define rall3(i,a,b) (i).rbegin()+a,(i).rbegin()+b#define rall(...) overload3(__VA_ARGS__,rall3,rall2,rall1)(__VA_ARGS__)#define sum(...) accumulate(all(__VA_ARGS__),0LL)#define dsum(...) accumulate(all(__VA_ARGS__),0.0L)#define Msum(...) accumulate(all(__VA_ARGS__),0_M)#define elif else if#define unless(a) if(!(a))#define INT(...) int __VA_ARGS__;in(__VA_ARGS__)#define LL(...) ll __VA_ARGS__;in(__VA_ARGS__)#define ULL(...) ull __VA_ARGS__;in(__VA_ARGS__)#define STR(...) string __VA_ARGS__;in(__VA_ARGS__)#define CHR(...) char __VA_ARGS__;in(__VA_ARGS__)#define DBL(...) double __VA_ARGS__;in(__VA_ARGS__)#define LD(...) ld __VA_ARGS__;in(__VA_ARGS__)#define Sort(a) sort(all(a))#define Rev(a) reverse(all(a))#define Uniq(a) sort(all(a));a.erase(unique(all(a)),end(a))#define vec(type,name,...) vector<type>name(__VA_ARGS__)#define VEC(type,name,size) vector<type>name(size);in(name)#define vv(type,name,h,...) vector<vector<type>>name(h,vector<type>(__VA_ARGS__))#define VV(type,name,h,w) vector<vector<type>>name(h,vector<type>(w));in(name)#define vvv(type,name,h,w,...) vector<vector<vector<type>>>name(h,vector<vector<type>>(w,vector<type>(__VA_ARGS__)))template<class T> auto min(const T& a){ return *min_element(all(a)); }template<class T> auto max(const T& a){ return *max_element(all(a)); }inline ll popcnt(ull a){ return __builtin_popcountll(a); }ll gcd(ll a, ll b){ while(b){ ll c = b; b = a % b; a = c; } return a; }ll lcm(ll a, ll b){ if(!a || !b) return 0; return a * b / gcd(a, b); }ll intpow(ll a, ll b){ ll ans = 1; while(b){ if(b & 1) ans *= a; a *= a; b /= 2; } return ans; }ll modpow(ll a, ll b, ll p){ ll ans = 1; while(b){ if(b & 1) (ans *= a) %= p; (a *= a) %= p; b /= 2; } return ans; }template<class T> bool chmin(T& a, const T& b){ if(a > b){ a = b; return 1; } return 0; }template<class T> bool chmax(T& a, const T& b){ if(a < b){ a = b; return 1; } return 0; }template<class T, class U> bool chmin(T& a, const U& b){ if(a > T(b)){ a = b; return 1; } return 0; }template<class T, class U> bool chmax(T& a, const U& b){ if(a < T(b)){ a = b; return 1; } return 0; }vector<ll> iota(ll n){ vector<ll> a(n); iota(a.begin(), a.end(), 0); return a; }vector<pll> factor(ull x){ vector<pll> ans; for(ull i = 2; i * i <= x; i++) if(x % i == 0){ ans.push_back({i, 1}); while((x /= i) % i == 0) ans.back().second++; } if(x != 1) ans.push_back({x, 1}); return ans; }map<ll,ll> factor_map(ull x){ map<ll,ll> ans; for(ull i = 2; i * i <= x; i++) if(x % i == 0){ ans[i] = 1; while((x /= i) % i == 0) ans[i]++; } if(x != 1) ans[x] = 1; return ans; }vector<ll> divisor(ull x){ vector<ll> ans; for(ull i = 1; i * i <= x; i++) if(x % i == 0) ans.push_back(i); rrep(ans.size() - (ans.back() * ans.back() == x)) ans.push_back(x / ans[i]); return ans; }template<class T> unordered_map<T, ll> press(vector<T> a){ Uniq(a); unordered_map<T, ll> ans; rep(a.size()) ans[a[i]] = i; return ans; }template<class T> map<T, ll> press_map(vector<T> a){ Uniq(a); map<T, ll> ans; rep(a.size()) ans[a[i]] = i; return ans; }int scan(){ return getchar(); }void scan(int& a){ scanf("%d", &a); }void scan(unsigned& a){ scanf("%u", &a); }void scan(long& a){ scanf("%ld", &a); }void scan(long long& a){ scanf("%lld", &a); }void scan(unsigned long long& a){ scanf("%llu", &a); }void scan(char& a){ do{ a = getchar(); }while(a == ' ' || a == '\n'); }void scan(float& a){ scanf("%f", &a); }void scan(double& a){ scanf("%lf", &a); }void scan(long double& a){ scanf("%Lf", &a); }void scan(vector<bool>& a){ for(unsigned i = 0; i < a.size(); i++){ int b; scan(b); a[i] = b; } }void scan(char a[]){ scanf("%s", a); }void scan(string& a){ cin >> a; }template<class T> void scan(vector<T>&);template<class T, size_t size> void scan(array<T, size>&);template<class T, class L> void scan(pair<T, L>&);template<class T, size_t size> void scan(T(&)[size]);template<class T> void scan(vector<T>& a){ for(auto&& i : a) scan(i); }template<class T> void scan(deque<T>& a){ for(auto&& i : a) scan(i); }template<class T, size_t size> void scan(array<T, size>& a){ for(auto&& i : a) scan(i); }template<class T, class L> void scan(pair<T, L>& p){ scan(p.first); scan(p.second); }template<class T, size_t size> void scan(T (&a)[size]){ for(auto&& i : a) scan(i); }template<class T> void scan(T& a){ cin >> a; }void in(){}template <class Head, class... Tail> void in(Head& head, Tail&... tail){ scan(head); in(tail...); }void print(){ putchar(' '); }void print(bool a){ printf("%d", a); }void print(int a){ printf("%d", a); }void print(unsigned a){ printf("%u", a); }void print(long a){ printf("%ld", a); }void print(long long a){ printf("%lld", a); }void print(unsigned long long a){ printf("%llu", a); }void print(char a){ printf("%c", a); }void print(char a[]){ printf("%s", a); }void print(const char a[]){ printf("%s", a); }void print(float a){ printf("%.15f", a); }void print(double a){ printf("%.15f", a); }void print(long double a){ printf("%.15Lf", a); }void print(const string& a){ for(auto&& i : a) print(i); }template<class T> void print(const complex<T>& a){ if(a.real() >= 0) print('+'); print(a.real()); if(a.imag() >= 0) print('+'); print(a.imag());print('i'); }template<class T> void print(const vector<T>&);template<class T, size_t size> void print(const array<T, size>&);template<class T, class L> void print(const pair<T, L>& p);template<class T, size_t size> void print(const T (&)[size]);template<class T> void print(const vector<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }template<class T> void print(const deque<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }template<class T, size_t size> void print(const array<T, size>& a){ print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i);} }template<class T, class L> void print(const pair<T, L>& p){ print(p.first); putchar(' '); print(p.second); }template<class T, size_t size> void print(const T (&a)[size]){ print(a[0]); for(auto i = a; ++i != end(a); ){ putchar(' '); print(*i); } }template<class T> void print(const T& a){ cout << a; }int out(){ putchar('\n'); return 0; }template<class T> int out(const T& t){ print(t); putchar('\n'); return 0; }template<class Head, class... Tail> int out(const Head& head, const Tail&... tail){ print(head); putchar(' '); out(tail...); return 0; }#ifdef DEBUGinline ll __lg(ull __n){ return sizeof(ull) * __CHAR_BIT__ - 1 - __builtin_clzll(__n); }#define debug(...) { print(#__VA_ARGS__); print(":"); out(__VA_ARGS__); }#else#define debug(...) void(0)#endifint first(bool i = true){ return out(i?"first":"second"); }int yes(bool i = true){ return out(i?"yes":"no"); }int Yes(bool i = true){ return out(i?"Yes":"No"); }int No(){ return out("No"); }int YES(bool i = true){ return out(i?"YES":"NO"); }int NO(){ return out("NO"); }int Yay(bool i = true){ return out(i?"Yay!":":("); }int possible(bool i = true){ return out(i?"possible":"impossible"); }int Possible(bool i = true){ return out(i?"Possible":"Impossible"); }int POSSIBLE(bool i = true){ return out(i?"POSSIBLE":"IMPOSSIBLE"); }void Case(ll i){ printf("Case #%lld: ", i); }constexpr uint mod = MODD;struct Modint{uint num = 0;constexpr Modint() noexcept {}constexpr Modint(const Modint &x) noexcept : num(x.num){}inline constexpr operator ll() const noexcept { return num; }inline constexpr Modint& operator+=(Modint x) noexcept { num += x.num; if(num >= mod) num -= mod; return *this; }inline constexpr Modint& operator++() noexcept { if(num == mod - 1) num = 0; else num++; return *this; }inline constexpr Modint operator++(int) noexcept { Modint ans(*this); operator++(); return ans; }inline constexpr Modint operator-() const noexcept { return Modint(0) -= *this; }inline constexpr Modint operator-(Modint x) const noexcept { return Modint(*this) -= x; }inline constexpr Modint& operator-=(Modint x) noexcept { if(num < x.num) num += mod; num -= x.num; return *this; }inline constexpr Modint& operator--() noexcept { if(num == 0) num = mod - 1; else num--; return *this; }inline constexpr Modint operator--(int) noexcept { Modint ans(*this); operator--(); return ans; }inline constexpr Modint& operator*=(Modint x) noexcept { num = ull(num) * x.num % mod; return *this; }inline constexpr Modint& operator/=(Modint x) noexcept { return operator*=(x.inv()); }template<class T> constexpr Modint(T x) noexcept {using U = typename conditional<sizeof(T) >= 4, T, int>::type;U y = x; y %= U(mod); if(y < 0) y += mod; num = uint(y);}template<class T> inline constexpr Modint operator+(T x) const noexcept { return Modint(*this) += x; }template<class T> inline constexpr Modint& operator+=(T x) noexcept { return operator+=(Modint(x)); }template<class T> inline constexpr Modint operator-(T x) const noexcept { return Modint(*this) -= x; }template<class T> inline constexpr Modint& operator-=(T x) noexcept { return operator-=(Modint(x)); }template<class T> inline constexpr Modint operator*(T x) const noexcept { return Modint(*this) *= x; }template<class T> inline constexpr Modint& operator*=(T x) noexcept { return operator*=(Modint(x)); }template<class T> inline constexpr Modint operator/(T x) const noexcept { return Modint(*this) /= x; }template<class T> inline constexpr Modint& operator/=(T x) noexcept { return operator/=(Modint(x)); }inline constexpr Modint inv() const noexcept { ll x = 0, y = 0; extgcd(num, mod, x, y); return x; }static inline constexpr ll extgcd(ll a, ll b, ll &x, ll &y) noexcept { ll g = a; x = 1; y = 0; if(b){ g = extgcd(b, a % b, y, x); y -= a / b * x;} return g; }inline constexpr Modint pow(ull x) const noexcept { Modint ans = 1, cnt = *this; while(x){ if(x & 1) ans *= cnt; cnt *= cnt; x /= 2; } return ans; }};std::istream& operator>>(std::istream& is, Modint& x){ ll a; in(a); x = a; return is; }inline constexpr Modint operator""_M(ull x) noexcept { return Modint(x); }std::vector<Modint> fac(1, 1), inv(1, 1);inline void reserve(ll a){if(fac.size() >= a) return;if(a < fac.size() * 2) a = fac.size() * 2;if(a >= mod) a = mod;while(fac.size() < a) fac.push_back(fac.back() * Modint(fac.size()));inv.resize(fac.size());inv.back() = fac.back().inv();for(ll i = inv.size() - 1; !inv[i - 1]; i--) inv[i - 1] = inv[i] * i;}inline Modint fact(ll n){ if(n < 0) return 0; reserve(n + 1); return fac[n]; }inline Modint perm(ll n, ll r){if(r < 0 || n < r) return 0;if(n >> 24){ Modint ans = 1; for(ll i = 0; i < r; i++) ans *= n--; return ans; }reserve(n + 1); return fac[n] * inv[n - r];}inline Modint comb(ll n, ll r){ if(r < 0 || n < r) return 0; reserve(r + 1); return perm(n, r) * inv[r]; }inline Modint Mcomb(ll n, ll r){ return comb(n + r - 1, n - 1); } // r balls into n boxesinline Modint catalan(ll n){ reserve(n * 2 + 1); return fac[n * 2] * inv[n] * inv[n + 1]; }struct Matrix{Modint a[2][2] = {};auto operator[](ll i) const { return a[i]; }auto operator[](ll i){ return a[i]; }Matrix operator*(const Matrix& b) const {Matrix ans;rep(2)rep(j,2)rep(k,2)ans[i][j]+=a[i][k]*b[k][j];return ans;}Matrix& operator*=(const Matrix& b){return *this = *this * b;}Matrix pow(ull x){Matrix ans, a = *this;ans[0][0] = ans[1][1] = 1;while(x){if(x & 1) ans *= a;a *= a;x /= 2;}return ans;}};signed main(){LL(n,m);VEC(ll,p,n);each(i,p)i--;vec(Modint,dp,m+1,1);vector<ll>cycle;vec(bool,used,n);rep(n)if(!used[i]){ll cnt=0,at=i;while(!used[at]){used[at]=1;cnt++;at=p[at];}cycle.push_back(cnt);}rep(i,2,m+1)each(l,cycle){Matrix a;a[0][1]=i-1;a[1][0]=1;a[1][1]=i-2;dp[i]*=a.pow(l)[0][0]*i;}Modint ans=0;rep(i,2,m+1)ans+=dp[i]*comb(m,i)*((m^i)&1?-1:1);out(ans/fact(m));}