結果
問題 | No.1821 LEQ-GEQ Permutations |
ユーザー | riano |
提出日時 | 2021-12-29 23:38:25 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 315 ms / 2,500 ms |
コード長 | 4,645 bytes |
コンパイル時間 | 1,936 ms |
コンパイル使用メモリ | 176,632 KB |
実行使用メモリ | 52,352 KB |
最終ジャッジ日時 | 2024-10-04 18:36:13 |
合計ジャッジ時間 | 5,379 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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 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 | 6 ms
5,248 KB |
testcase_08 | AC | 17 ms
5,632 KB |
testcase_09 | AC | 219 ms
37,376 KB |
testcase_10 | AC | 3 ms
5,248 KB |
testcase_11 | AC | 20 ms
6,272 KB |
testcase_12 | AC | 17 ms
5,632 KB |
testcase_13 | AC | 43 ms
9,472 KB |
testcase_14 | AC | 96 ms
17,920 KB |
testcase_15 | AC | 199 ms
34,304 KB |
testcase_16 | AC | 191 ms
32,768 KB |
testcase_17 | AC | 89 ms
16,640 KB |
testcase_18 | AC | 315 ms
52,224 KB |
testcase_19 | AC | 314 ms
52,352 KB |
testcase_20 | AC | 314 ms
52,352 KB |
testcase_21 | AC | 314 ms
52,224 KB |
testcase_22 | AC | 313 ms
52,352 KB |
testcase_23 | AC | 5 ms
5,248 KB |
testcase_24 | AC | 4 ms
5,248 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define ll long long #define rep(i,n) for(int i=0;i<n;i++) #define rrep(i,n) for(int i=n-1;i>=0;i--) #define rrep2(i,n,k) for(int i=n-1;i>=n-k;i--) #define vll(n,i) vector<long long>(n,i) #define v2ll(n,m,i) vector<vector<long long>>(n,vll(m,i)) #define v3ll(n,m,k,i) vector<vector<vector<long long>>>(n,v2ll(m,k,i)) #define v4ll(n,m,k,l,i) vector<vector<vector<vector<long long>>>>(n,v3ll(m,k,l,i)) #define all(v) v.begin(),v.end() #define chmin(k,m) k = min(k,m) #define chmax(k,m) k = max(k,m) #define Pr pair<ll,ll> #define Tp tuple<ll,ll,ll> #define riano_ std::ios::sync_with_stdio(false);std::cin.tie(nullptr) using Graph = vector<vector<int>>; const ll mod = 998244353; template<uint64_t mod> struct modint{ uint64_t val; constexpr modint(const int64_t val_=0) noexcept:val((val_%int64_t(mod)+int64_t(mod))%int64_t(mod)){} constexpr modint operator-() const noexcept{ return modint(*this)=mod-val; } constexpr modint operator+(const modint rhs) const noexcept{ return modint(*this)+=rhs; } constexpr modint operator-(const modint rhs) const noexcept{ return modint(*this)-=rhs; } constexpr modint operator*(const modint rhs) const noexcept{ return modint(*this)*=rhs; } constexpr modint operator/(const modint rhs) const noexcept{ return modint(*this)/=rhs; } constexpr modint &operator+=(const modint rhs) noexcept{ val+=rhs.val; val-=((val>=mod)?mod:0); return (*this); } constexpr modint &operator-=(const modint rhs) noexcept{ val+=((val<rhs.val)?mod:0); val-=rhs.val; return (*this); } constexpr modint &operator*=(const modint rhs) noexcept{ val=val*rhs.val%mod; return (*this); } constexpr modint &operator/=(modint rhs) noexcept{ uint64_t ex=mod-2; modint now=1; while(ex){ now*=((ex&1)?rhs:1); rhs*=rhs,ex>>=1; } return (*this)*=now; } modint & operator++(){ val++; if (val == mod) val = 0; return *this; } modint operator++(int){ modint<mod> res = *this; ++*this; return res; } constexpr bool operator==(const modint rhs) noexcept{ return val==rhs.val; } constexpr bool operator!=(const modint rhs) noexcept{ return val!=rhs.val; } friend constexpr ostream &operator<<(ostream& os,const modint x) noexcept{ return os<<(x.val); } friend constexpr istream &operator>>(istream& is,modint& x) noexcept{ uint64_t t; is>>t,x=t; return is; } }; typedef modint<mod> mint; mint pw(long long a,long long b,long long m = mod){ if(a%m==0) return mint(0); if(b==0) return mint(1); else if(b%2==0){ long long x = pw(a,b/2,m).val; return mint(x*x); } else{ long long x = pw(a,b-1,m).val; return mint(a*x); } } mint modinv(long long a, long long m = mod) { long long b = m, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } u %= m; return mint(u); } #define vm(n,i) vector<mint>(n,i) #define v2m(n,m,i) vector<vector<mint>>(n,vm(m,i)) #define v3m(n,m,k,i) vector<vector<vector<mint>>>(n,v2m(m,k,i)) #define v4m(n,m,k,l,i) vector<vector<vector<vector<mint>>>>(n,v3m(m,k,l,i)) //Combination2 //10^6くらいまで vector<ll> fact; vector<ll> invf; ll comb(ll n,ll k){ if(n<0||k<0||k>n) return 0LL; else{ ll a = fact[n]*invf[k]%mod; a = a*invf[n-k]%mod; return a; } } int main() { riano_; mint ans = 0; ll N; cin >> N; //main関数内に以下ペースト //N:max fact.assign(N+1,1LL); invf.assign(N+1,1LL); rep(i,N) fact[i+1] = fact[i]*(i+1)%mod; rep(i,N+1) invf[i] = modinv(fact[i],mod).val; string S; cin >> S; ll K = 0; rep(i,N){ if(S[i]=='0') K++; assert(S[i]=='0'||S[i]=='1'); } assert(1<=N&&N<=5000); assert(S.size()==N); auto dp = v2m(K+2,N-K+2,0); dp[0][0] = 1; rep(i,K+1){ rep(j,N-K+1){ dp[i+1][j+1] += mint(i+j+1)*dp[i][j]; dp[i+1][j] += mint(j)*dp[i][j]; dp[i][j+1] += mint(i)*dp[i][j]; } } rep(i,K+1){ rep(j,N-K+1){ ans += dp[i][j]*mint(fact[i])*mint(fact[j])*mint(comb(K,i))*mint(comb(N-K,j))* mint(fact[K-i])*mint(fact[N-K-j])*mint(comb(N,K-i))*mint(comb(N-K+i,N-K-j)); } } cout << ans << endl; }