結果
問題 | No.243 出席番号(2) |
ユーザー | moti |
提出日時 | 2015-12-20 02:57:23 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 188 ms / 2,000 ms |
コード長 | 3,724 bytes |
コンパイル時間 | 909 ms |
コンパイル使用メモリ | 104,744 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-09-17 11:18:17 |
合計ジャッジ時間 | 3,925 ms |
ジャッジサーバーID (参考情報) |
judge6 / judge5 |
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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 | 1 ms
6,812 KB |
testcase_01 | AC | 1 ms
6,940 KB |
testcase_02 | AC | 1 ms
6,948 KB |
testcase_03 | AC | 9 ms
6,940 KB |
testcase_04 | AC | 9 ms
6,944 KB |
testcase_05 | AC | 9 ms
6,944 KB |
testcase_06 | AC | 9 ms
6,944 KB |
testcase_07 | AC | 10 ms
6,944 KB |
testcase_08 | AC | 32 ms
6,940 KB |
testcase_09 | AC | 32 ms
6,944 KB |
testcase_10 | AC | 32 ms
6,940 KB |
testcase_11 | AC | 32 ms
6,944 KB |
testcase_12 | AC | 32 ms
6,944 KB |
testcase_13 | AC | 69 ms
6,940 KB |
testcase_14 | AC | 69 ms
6,944 KB |
testcase_15 | AC | 69 ms
6,944 KB |
testcase_16 | AC | 69 ms
6,940 KB |
testcase_17 | AC | 69 ms
6,944 KB |
testcase_18 | AC | 120 ms
6,940 KB |
testcase_19 | AC | 120 ms
6,944 KB |
testcase_20 | AC | 120 ms
6,940 KB |
testcase_21 | AC | 120 ms
6,944 KB |
testcase_22 | AC | 121 ms
6,940 KB |
testcase_23 | AC | 187 ms
6,940 KB |
testcase_24 | AC | 187 ms
6,944 KB |
testcase_25 | AC | 187 ms
6,940 KB |
testcase_26 | AC | 188 ms
6,940 KB |
testcase_27 | AC | 187 ms
6,944 KB |
testcase_28 | AC | 2 ms
6,944 KB |
testcase_29 | AC | 2 ms
6,944 KB |
testcase_30 | AC | 2 ms
6,944 KB |
testcase_31 | AC | 2 ms
6,944 KB |
testcase_32 | AC | 2 ms
6,940 KB |
ソースコード
#include <iostream> #include <algorithm> #include <cmath> #include <vector> #include <complex> #include <queue> #include <deque> #include <set> #include <map> #include <unordered_set> #include <unordered_map> #include <iomanip> #include <assert.h> #include <array> #include <cstdio> #include <cstring> #include <random> #include <functional> #include <numeric> #include <bitset> using namespace std; #define REP(i,a,b) for(int i=a;i<(int)b;i++) #define rep(i,n) REP(i,0,n) #define all(c) (c).begin(), (c).end() #define zero(a) memset(a, 0, sizeof a) #define minus(a) memset(a, -1, sizeof a) #define minimize(a, x) a = std::min(a, x) #define maximize(a, x) a = std::max(a, x) typedef long long ll; int const inf = 1<<29; template<class value_type, int MOD> class ModInt { private: value_type val_; static value_type mod_pow(value_type x, value_type n, value_type mo) { value_type ret = 1; while(n > 0) { if(n & 1) { ret = ret * x % mo; } x = x * x % mo; n >>= 1; } return ret; } public: ModInt() { val_ = 0; } ModInt(value_type x) { val_ = (x % MOD + MOD) % MOD; } ModInt const operator + (ModInt const& rhs) const { return std::move(ModInt(val_+rhs.get())); } ModInt const operator - (ModInt const& rhs) const { return std::move(ModInt(val_-rhs.get())); } ModInt const operator * (ModInt const& rhs) const { return std::move(ModInt(val_*rhs.get())); } ModInt const operator / (ModInt const& rhs) const { return std::move(ModInt(val_*mod_pow(rhs.get(), MOD-2, MOD))); // fermat theorem } friend ModInt const operator + (value_type lhs, ModInt const& rhs) { return std::move(ModInt(lhs+rhs.get())); } friend ModInt const operator - (value_type lhs, ModInt const& rhs) { return std::move(ModInt(lhs-rhs.get())); } friend ModInt const operator * (value_type lhs, ModInt const& rhs) { return std::move(ModInt(lhs*rhs.get())); } friend ModInt const operator / (value_type lhs, ModInt const& rhs) { return std::move(ModInt(lhs*mod_pow(rhs.get(), MOD-2, MOD))); // fermat theorem } ModInt operator += (ModInt const& rhs) { return *this = ModInt(val_+rhs.get()).get(); } ModInt operator -= (ModInt const& rhs) { return *this = ModInt(val_-rhs.get()).get(); } ModInt operator *= (ModInt const& rhs) { return *this = ModInt(val_*rhs.get()).get(); } ModInt operator /= (ModInt const& rhs) { return *this = ModInt(val_*mod_pow(rhs.get(), MOD-2, MOD)).get(); } bool operator == (ModInt const& rhs) const { return val_ == rhs.get(); } value_type const get() const { return val_; } value_type & get() { return val_; } friend ostream& operator << (ostream& ost, ModInt const& x) { return ost << x.get(); } friend istream& operator >> (istream& ist, ModInt& x) { string s; ist >> s; int size = s.size(); x.get() = 0; rep(i, size) { x.get() *= 10; x.get() += s[i]-'0'; x.get() %= MOD; } return ist; } }; typedef ModInt<long long, 1000000007> mint; vector<mint> dp(5050); vector<mint> P(5050); int ngnums[5050]; int main() { int N; cin >> N; rep(i, N) { int a; cin >> a; ngnums[a]++; } dp[0] = 1; rep(i, N) for(int j=N-1; j>=0; j--) dp[j + 1] += dp[j] * ngnums[i]; // i1がダメな生徒 ∨ i2がダメな生徒 ∨ ... P[0] = 1; REP(i, 1, N+1) P[i] = P[i-1] * i; mint ans = 0; // ダメな割当のない自由な割当 = 完全に自由な割当 - 1人だけダメな割当 + 2人だけダメな割当 - 3人だけダメな割当 + ... + (-1)^k k人ダメな割当 + ... (-1)^N N人ダメな割当 rep(i, N+1) { ans += (i % 2 == 0 ? +1 : -1) * dp[i] * P[N - i]; } cout << ans << endl; return 0; }