結果
問題 | No.1785 Inequality Signs |
ユーザー | riano |
提出日時 | 2021-12-18 23:32:39 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 202 ms / 2,000 ms |
コード長 | 4,120 bytes |
コンパイル時間 | 1,704 ms |
コンパイル使用メモリ | 170,356 KB |
実行使用メモリ | 6,400 KB |
最終ジャッジ日時 | 2024-09-15 14:11:10 |
合計ジャッジ時間 | 8,735 ms |
ジャッジサーバーID (参考情報) |
judge6 / judge4 |
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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 | 31 ms
5,376 KB |
testcase_02 | AC | 140 ms
5,504 KB |
testcase_03 | AC | 193 ms
6,144 KB |
testcase_04 | AC | 4 ms
5,376 KB |
testcase_05 | AC | 80 ms
5,376 KB |
testcase_06 | AC | 173 ms
5,760 KB |
testcase_07 | AC | 7 ms
5,376 KB |
testcase_08 | AC | 166 ms
5,888 KB |
testcase_09 | AC | 30 ms
5,376 KB |
testcase_10 | AC | 120 ms
5,376 KB |
testcase_11 | AC | 36 ms
5,376 KB |
testcase_12 | AC | 68 ms
5,376 KB |
testcase_13 | AC | 27 ms
5,376 KB |
testcase_14 | AC | 90 ms
5,376 KB |
testcase_15 | AC | 73 ms
5,376 KB |
testcase_16 | AC | 56 ms
5,376 KB |
testcase_17 | AC | 120 ms
5,376 KB |
testcase_18 | AC | 120 ms
5,376 KB |
testcase_19 | AC | 95 ms
5,376 KB |
testcase_20 | AC | 108 ms
5,376 KB |
testcase_21 | AC | 97 ms
5,376 KB |
testcase_22 | AC | 33 ms
5,376 KB |
testcase_23 | AC | 54 ms
5,376 KB |
testcase_24 | AC | 193 ms
6,144 KB |
testcase_25 | AC | 73 ms
5,376 KB |
testcase_26 | AC | 69 ms
5,376 KB |
testcase_27 | AC | 201 ms
6,400 KB |
testcase_28 | AC | 202 ms
6,400 KB |
testcase_29 | AC | 199 ms
6,400 KB |
testcase_30 | AC | 200 ms
6,400 KB |
testcase_31 | AC | 200 ms
6,400 KB |
testcase_32 | AC | 201 ms
6,400 KB |
testcase_33 | AC | 2 ms
5,376 KB |
testcase_34 | AC | 11 ms
5,376 KB |
testcase_35 | AC | 29 ms
5,376 KB |
testcase_36 | AC | 164 ms
5,632 KB |
testcase_37 | AC | 195 ms
6,272 KB |
testcase_38 | AC | 163 ms
5,632 KB |
testcase_39 | AC | 44 ms
5,376 KB |
testcase_40 | AC | 65 ms
5,376 KB |
testcase_41 | AC | 107 ms
5,376 KB |
testcase_42 | AC | 199 ms
6,144 KB |
testcase_43 | AC | 194 ms
6,144 KB |
testcase_44 | AC | 162 ms
5,760 KB |
testcase_45 | AC | 65 ms
5,376 KB |
testcase_46 | AC | 157 ms
5,632 KB |
testcase_47 | AC | 93 ms
5,376 KB |
testcase_48 | AC | 122 ms
5,376 KB |
testcase_49 | AC | 8 ms
5,376 KB |
testcase_50 | AC | 161 ms
5,760 KB |
testcase_51 | AC | 16 ms
5,376 KB |
testcase_52 | AC | 11 ms
5,376 KB |
testcase_53 | AC | 23 ms
5,376 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<Pr>>; const ll mod = 1000000007; 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,K; cin >> N >> K; //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; mint cc = mint(K); rep(i,N){ ans += mint(comb(N-1,i))*pw(2,i)*cc; cc *= mint(K-1-i); cc /= mint(i+2); } cout << ans << endl; }