結果
問題 | No.140 みんなで旅行 |
ユーザー | sune232002 |
提出日時 | 2015-01-30 00:14:40 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 63 ms / 5,000 ms |
コード長 | 4,642 bytes |
コンパイル時間 | 1,315 ms |
コンパイル使用メモリ | 161,932 KB |
実行使用メモリ | 50,400 KB |
最終ジャッジ日時 | 2024-06-23 04:19:18 |
合計ジャッジ時間 | 3,396 ms |
ジャッジサーバーID (参考情報) |
judge3 / 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 | 58 ms
50,272 KB |
testcase_01 | AC | 57 ms
50,272 KB |
testcase_02 | AC | 57 ms
50,176 KB |
testcase_03 | AC | 59 ms
50,304 KB |
testcase_04 | AC | 55 ms
50,304 KB |
testcase_05 | AC | 57 ms
50,392 KB |
testcase_06 | AC | 57 ms
50,304 KB |
testcase_07 | AC | 58 ms
50,176 KB |
testcase_08 | AC | 59 ms
50,176 KB |
testcase_09 | AC | 57 ms
50,304 KB |
testcase_10 | AC | 59 ms
50,304 KB |
testcase_11 | AC | 63 ms
50,304 KB |
testcase_12 | AC | 58 ms
50,304 KB |
testcase_13 | AC | 57 ms
50,264 KB |
testcase_14 | AC | 62 ms
50,176 KB |
testcase_15 | AC | 63 ms
50,392 KB |
testcase_16 | AC | 59 ms
50,304 KB |
testcase_17 | AC | 57 ms
50,304 KB |
testcase_18 | AC | 60 ms
50,304 KB |
testcase_19 | AC | 60 ms
50,268 KB |
testcase_20 | AC | 58 ms
50,400 KB |
testcase_21 | AC | 57 ms
50,268 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define REP(i,n) for(int i=0;i<(int)(n);++i) #define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i) #define ALL(c) (c).begin(), (c).end() #define valid(y,x,h,w) (0<=y&&y<h&&0<=x&&x<w) #define tpl(...) make_tuple(__VA_ARGS__) const int INF = 0x3f3f3f3f; const double EPS = 1e-8; const double PI = acos(-1); typedef long long ll; typedef pair<int,int> pii; template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; } template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; } template<typename Ch,typename Tr,typename C,typename=decltype(begin(C()))>basic_ostream<Ch,Tr>& operator<<(basic_ostream<Ch,Tr>&os, const C& c){os<<'[';for(auto i=begin(c);i!=end(c);++i)os<<(i==begin(c)?"":" ")<<*i;return os<<']';} template<class S,class T>ostream&operator<<(ostream &o,const pair<S,T>&t){return o<<'('<<t.first<<','<<t.second<<')';} template<int N,class Tp>void output(ostream&,const Tp&){} template<int N,class Tp,class,class ...Ts>void output(ostream &o,const Tp&t){if(N)o<<',';o<<get<N>(t);output<N+1,Tp,Ts...>(o,t);} template<class ...Ts>ostream&operator<<(ostream&o,const tuple<Ts...>&t){o<<'(';output<0,tuple<Ts...>,Ts...>(o,t);return o<<')';} template<class T>void output(T t,char z=10){if(t<0)t=-t,putchar(45);int c[20]; int k=0;while(t)c[k++]=t%10,t/=10;for(k||(c[k++]=0);k;)putchar(c[--k]^48);putchar(z);} template<class T>void outputs(T t){output(t);} template<class S,class ...T>void outputs(S a,T...t){output(a,32);outputs(t...);} template<class T>void output(T *a,int n){REP(i,n)cout<<a[i]<<(i!=n-1?',':'\n');} template<class T>void output(T *a,int n,int m){REP(i,n)output(a[i],m);} template<class T>bool input(T &t){int n=1,c;for(t=0;!isdigit(c=getchar())&&~c&&c-45;); if(!~c)return 0;for(c-45&&(n=0,t=c^48);isdigit(c=getchar());)t=10*t+c-48;t=n?-t:t;return 1;} template<class S,class ...T>bool input(S&a,T&...t){input(a);return input(t...);} template<class T>bool inputs(T *a, int n) { REP(i,n) if(!input(a[i])) return 0; return 1;} template<int MOD> struct ModInt { int x; ModInt() : x(0) {} ModInt(ll s) { if ((x = s % MOD) < 0) x += MOD; } ModInt operator+=(ModInt rhs) { if ((x+=rhs.x) >= MOD) x -= MOD; return *this; } ModInt operator-=(ModInt rhs) { if ((x-=rhs.x) < 0) x += MOD; return *this; } ModInt operator*=(ModInt rhs) { x = (ll)x*rhs.x % MOD; return *this; } ModInt operator+(ModInt rhs) const { return ModInt(*this) += rhs; } ModInt operator-(ModInt rhs) const { return ModInt(*this) -= rhs; } ModInt operator*(ModInt rhs) const { return ModInt(*this) *= rhs; } ModInt operator/=(ModInt rhs) { static const ll inv2 = ModInt(2).inv().x; // 2で割るのは特別に保存してみる ll i = (rhs.x == 2 ? inv2 : rhs.inv().x); x = x*i%MOD; return *this; } ModInt operator/(ModInt rhs) const { return ModInt(*this) /= rhs; } ModInt inv() { return pow(MOD-2); } ModInt pow(ll n) const { ModInt r = 1, t = x; for (;n;n>>=1,t*=t) if (n&1) r *= t; return r; } friend ostream& operator<<(ostream &os, const ModInt rhs){ return os << rhs.x; } }; typedef ModInt<int(1e9+7)> mint; // 順番を考慮した分割数 const int MAX_N = 2000; mint part[MAX_N][MAX_N]; // void calc_part(int n, int k) { // memset(part, 0, sizeof(part)); // part[0][0] = 1; // for (int i=0; i<=n; ++i) // for (int j=1; j<=k; ++j) // part[i][j] = part[i][j-1] + (i>0?part[i-1][j]:0); // } void calc_part(int n, int k) { memset(part, 0, sizeof(part)); part[0][0] = 1; for (int i=0; i<=n; ++i) for (int j=1; j<=k; ++j) part[i][j] = part[i][j-1] + (i-j>=0?part[i-j][j]:0); } const int NUM = 2000; mint combi[NUM][NUM]; void calcCombi() { combi[0][0] = 1; REP(i, NUM-1) { combi[i][0] = combi[i][i] = 1; REP(j, i) combi[i+1][j+1] = combi[i][j] + combi[i][j+1]; } } mint dp[2000][2000]; int main() { memset(dp,0,sizeof(dp)); dp[0][0] = 1; REP(i,2000) { REP(j,2000) { if (i>0&&j>0) dp[i][j] += dp[i-1][j-1]; if (i>0) dp[i][j] += dp[i-1][j]*j; } } calc_part(1500,1500); calcCombi(); int n; while(cin>>n) { mint ans = 0; for (int g=1; g<=n; ++g) { for (int a=g; a<=n; ++a) { // mint tmp = part[a][g] - part[a][g-1]; mint tmp = dp[a][g]; // cout << tmp << endl; tmp *= combi[n][a]; // cout << a << " "<< g << " " << part[a][g] << " " << part[a][g-1] << " " << tmp << " " << endl; tmp *= mint(g*(g-1)).pow(n-a); ans += tmp; // cout << g << " " << a << " " << tmp << endl; } } cout << ans << endl; } }