結果
問題 | No.1238 選抜クラス |
ユーザー | mugen_1337 |
提出日時 | 2020-09-25 23:17:13 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,310 ms / 2,000 ms |
コード長 | 5,257 bytes |
コンパイル時間 | 2,369 ms |
コンパイル使用メモリ | 209,912 KB |
実行使用メモリ | 35,328 KB |
最終ジャッジ日時 | 2024-06-28 07:23:56 |
合計ジャッジ時間 | 23,669 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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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 | 4 ms
6,816 KB |
testcase_01 | AC | 4 ms
6,944 KB |
testcase_02 | AC | 14 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 3 ms
6,940 KB |
testcase_05 | AC | 3 ms
6,940 KB |
testcase_06 | AC | 3 ms
6,944 KB |
testcase_07 | AC | 9 ms
6,944 KB |
testcase_08 | AC | 14 ms
6,940 KB |
testcase_09 | AC | 28 ms
8,192 KB |
testcase_10 | AC | 10 ms
6,940 KB |
testcase_11 | AC | 24 ms
7,692 KB |
testcase_12 | AC | 17 ms
6,940 KB |
testcase_13 | AC | 16 ms
6,944 KB |
testcase_14 | AC | 14 ms
6,944 KB |
testcase_15 | AC | 28 ms
8,064 KB |
testcase_16 | AC | 24 ms
7,688 KB |
testcase_17 | AC | 1,300 ms
35,200 KB |
testcase_18 | AC | 1,228 ms
34,432 KB |
testcase_19 | AC | 1,243 ms
34,560 KB |
testcase_20 | AC | 1,167 ms
33,632 KB |
testcase_21 | AC | 1,097 ms
32,768 KB |
testcase_22 | AC | 1,310 ms
35,324 KB |
testcase_23 | AC | 1,307 ms
35,328 KB |
testcase_24 | AC | 1,302 ms
35,200 KB |
testcase_25 | AC | 1,292 ms
35,200 KB |
testcase_26 | AC | 1,309 ms
35,328 KB |
testcase_27 | AC | 1,305 ms
35,200 KB |
testcase_28 | AC | 1,298 ms
35,200 KB |
testcase_29 | AC | 1,248 ms
34,688 KB |
testcase_30 | AC | 115 ms
13,056 KB |
testcase_31 | AC | 389 ms
20,964 KB |
testcase_32 | AC | 765 ms
28,032 KB |
testcase_33 | AC | 8 ms
6,940 KB |
testcase_34 | AC | 934 ms
30,464 KB |
testcase_35 | AC | 180 ms
15,616 KB |
testcase_36 | AC | 43 ms
9,236 KB |
testcase_37 | AC | 128 ms
13,824 KB |
testcase_38 | AC | 1,159 ms
33,632 KB |
ソースコード
#include<bits/stdc++.h> using namespace std; #define ALL(x) x.begin(),x.end() #define rep(i,n) for(int i=0;i<(n);i++) #define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl; #define mod 1000000007 using ll=long long; const int INF=1000000000; const ll LINF=1001002003004005006ll; int dx[]={1,0,-1,0},dy[]={0,1,0,-1}; // ll gcd(ll a,ll b){return b?gcd(b,a%b):a;} template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;} template<class T>bool chmin(T &a,const T &b){if(b<a){a=b;return true;}return false;} struct IOSetup{ IOSetup(){ cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(12); } } iosetup; template<typename T1,typename T2> ostream &operator<<(ostream &os,const pair<T1,T2>&p){ os<<p.first<<" "<<p.second; return os; } template<typename T> ostream &operator<<(ostream &os,const vector<T>&v){ for(int i=0;i<(int)v.size();i++) os<<v[i]<<(i+1==(int)v.size()?"":" "); return os; } template<typename T1,typename T2> istream &operator>>(istream &is,pair<T1,T2>&p){ is>>p.first>>p.second; return is; } template<typename T> istream &operator>>(istream &is,vector<T>&v){ for(T &x:v)is>>x; return is; } template<ll Mod> struct ModInt{ long long x; ModInt():x(0){} ModInt(long long y):x(y>=0?y%Mod:(Mod-(-y)%Mod)%Mod){} ModInt &operator+=(const ModInt &p){ if((x+=p.x)>=Mod) x-=Mod; return *this; } ModInt &operator-=(const ModInt &p){ if((x+=Mod-p.x)>=Mod)x-=Mod; return *this; } ModInt &operator*=(const ModInt &p){ x=(int)(1ll*x*p.x%Mod); return *this; } ModInt &operator/=(const ModInt &p){ (*this)*=p.inverse(); return *this; } ModInt operator-()const{return ModInt(-x);} ModInt operator+(const ModInt &p)const{return ModInt(*this)+=p;} ModInt operator-(const ModInt &p)const{return ModInt(*this)-=p;} ModInt operator*(const ModInt &p)const{return ModInt(*this)*=p;} ModInt operator/(const ModInt &p)const{return ModInt(*this)/=p;} ModInt operator==(const ModInt &p)const{return x==p.x;} ModInt operator!=(const ModInt &p)const{return x!=p.x;} ModInt inverse()const{ int a=x,b=Mod,u=1,v=0,t; while(b>0){ t=a/b; swap(a-=t*b,b);swap(u-=t*v,v); } return ModInt(u); } ModInt pow(long long n)const{ ModInt ret(1),mul(x); while(n>0){ if(n&1) ret*=mul; mul*=mul;n>>=1; } return ret; } friend ostream &operator<<(ostream &os,const ModInt &p){return os<<p.x;} friend istream &operator>>(istream &is,ModInt &a){long long t;is>>t;a=ModInt<Mod>(t);return (is);} static int get_mod(){return Mod;} }; using mint=ModInt<mod>; template<int MAX> struct comcalc{ vector<mint> fact,finv,inv; comcalc():fact(MAX),finv(MAX),inv(MAX){ fact[0]=mint(1),fact[1]=mint(1),finv[0]=mint(1),finv[1]=mint(1),inv[1]=mint(1); for(int i=2;i<MAX;i++){ fact[i]=fact[i-1]*mint(i); inv[i]=mint(0)-inv[mod%i]*(mint(mod/i)); finv[i]=finv[i-1]*inv[i]; } } mint com(int n,int k){ if(n<k) return mint(0); if(n<0 or k<0) return mint(0); return fact[n]*(finv[k]*finv[n-k]); } mint fac(int n){ return fact[n]; } // 重複組み合わせ:n種類の物から重複を許し,k個選ぶ mint nHk(int n,int k){ return com(n+k-1,k); } // 玉n区別,箱k区別,各箱1個以上O(k) mint F12_dis_dis_one(int n,int k){ if(n<k)return mint(0); mint ret=0; for(int i=0;i<=k;i++){ mint add=com(k,i)*(mint(i).pow(n)); if((k-i)%2) ret-=add; else ret+=add; } return ret; } /* sum combination(n+x, x), x=l to r https://www.wolframalpha.com/input/?i=sum+combination%28n%2Bx+%2Cx%29%2C+x%3Dl+to+r&lang=ja check n+x < [COM_PRECALC_MAX] */ mint sum_of_comb(int n,int l,int r){ if(l>r)return mint(0); mint ret=mint(r+1)*com(n+r+1,r+1)-mint(l)*com(l+n,l); ret/=mint(n+1); return ret; } }; mint pow_mod(mint x,ll n){ return x.pow(n); } mint inv_mod(mint x){ return x.inverse(); } // O(n) mint fact_mod(ll n){ mint ret=1; for(int i=2;i<=n;i++) ret*=mint(i); return ret; } // O(r) mint comb_mod(ll n,ll r){ if(r>n-r) r=n-r; if(r==0) return 1; mint a=1,b=mint(fact_mod(r)).inverse(); for(int i=0;i<r;i++)a*=mint(n-i); return a*b; } const int MAX=4010000; using cominit=comcalc<MAX>; signed main(){ int n,k;cin>>n>>k; vector<int> a(n); cin>>a; // i人でスコアj vector<vector<mint>> dp(n+1,vector<mint>(20001,0)); dp[0][0]=1; for(auto x:a){ vector<vector<mint>> ndp(n+1,vector<mint>(20001,0)); rep(i,n)rep(j,20001){ if(j+x<20001)ndp[i+1][j+x]+=dp[i][j]; ndp[i][j]+=dp[i][j]; } swap(dp,ndp); } mint res=0; for(int i=1;i<=n;i++){ int need=k*i; for(int j=need;j<=20000;j++) res+=dp[i][j]; // cout<<res<<endl; } cout<<res<<endl; return 0; }