結果
問題 | No.2299 Antitypoglycemia |
ユーザー | asaringo |
提出日時 | 2023-05-12 21:39:03 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 361 ms / 2,000 ms |
コード長 | 4,172 bytes |
コンパイル時間 | 2,123 ms |
コンパイル使用メモリ | 203,784 KB |
実行使用メモリ | 19,328 KB |
最終ジャッジ日時 | 2024-05-06 11:22:33 |
合計ジャッジ時間 | 13,501 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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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 | 361 ms
19,200 KB |
testcase_01 | AC | 356 ms
19,072 KB |
testcase_02 | AC | 357 ms
19,200 KB |
testcase_03 | AC | 361 ms
19,200 KB |
testcase_04 | AC | 357 ms
19,072 KB |
testcase_05 | AC | 358 ms
19,200 KB |
testcase_06 | AC | 361 ms
19,200 KB |
testcase_07 | AC | 361 ms
19,200 KB |
testcase_08 | AC | 361 ms
19,200 KB |
testcase_09 | AC | 358 ms
19,328 KB |
testcase_10 | AC | 358 ms
19,072 KB |
testcase_11 | AC | 360 ms
19,200 KB |
testcase_12 | AC | 357 ms
19,072 KB |
testcase_13 | AC | 358 ms
19,072 KB |
testcase_14 | AC | 360 ms
19,072 KB |
testcase_15 | AC | 358 ms
19,072 KB |
testcase_16 | AC | 360 ms
19,072 KB |
testcase_17 | AC | 358 ms
19,200 KB |
testcase_18 | AC | 354 ms
19,072 KB |
testcase_19 | AC | 360 ms
19,200 KB |
testcase_20 | AC | 359 ms
19,200 KB |
testcase_21 | AC | 357 ms
19,200 KB |
testcase_22 | AC | 358 ms
19,072 KB |
testcase_23 | AC | 357 ms
19,072 KB |
testcase_24 | AC | 360 ms
19,200 KB |
testcase_25 | AC | 358 ms
19,200 KB |
testcase_26 | AC | 359 ms
19,200 KB |
testcase_27 | AC | 360 ms
19,200 KB |
ソースコード
#include <bits/stdc++.h> using namespace std ; #define fast_input_output ios::sync_with_stdio(false); cin.tie(nullptr); // #pragma GCC target("avx2") // #pragma GCC optimize("O3") #pragma GCC target("avx") #pragma GCC optimize("Ofast") #pragma GCC optimize("unroll-loops") typedef long long ll ; typedef long double ld ; typedef pair<ll,ll> P ; typedef tuple<ll,ll,ll> TP ; #define chmin(a,b) a = min(a,b) #define chmax(a,b) a = max(a,b) #define bit_count(x) __builtin_popcountll(x) #define gcd(a,b) __gcd(a,b) #define lcm(a,b) a / gcd(a,b) * b #define rep(i,n) for(int i = 0 ; i < n ; i++) #define rrep(i,a,b) for(int i = a ; i < b ; i++) #define repi(it,S) for(auto it = S.begin() ; it != S.end() ; it++) #define pt(a) cout << a << endl #define DEBUG(...) ; cout << #__VA_ARGS__ << endl ; for(auto x : {__VA_ARGS__}) cout << x << " " ; cout << endl ; #define DEBUG_LIST(...) cout << #__VA_ARGS__ << endl ; DEBUG_REP(__VA_ARGS__) ; #define DEBUG_REP(V) cout << "{ " ; repi(itr,V) cout << *itr << ", " ; cout << "}" << endl ; #define debug(a) cout << #a << " " << a << endl #define all(a) a.begin(), a.end() #define endl "\n" const int mod = 998244353 ; template< int mod > struct ModInt { int x; ModInt() : x(0) {} ModInt(int64_t 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; } bool operator==(const ModInt &p) const { return x == p.x; } bool 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(int64_t 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) { int64_t t; is >> t; a = ModInt< mod >(t); return (is); } static int get_mod() { return mod; } }; using modint = ModInt< mod >; const int MAX_N = 2010101 ; modint inv[MAX_N+1] ; // (n!)^(p-2) (mod p) を格納 modint fac[MAX_N+1] ; // (n!) (mod p) を格納 modint powmod(modint x , ll n){ modint res = 1 ; while(n > 0){ if(n & 1) res *= x; x *= x; n >>= 1 ; } return res ; } // 階乗の逆元(n!)^(-1)のmodを配列に格納 void f(){ inv[0] = 1 ; inv[1] = 1 ; for(ll i = 2 ; i <= MAX_N ; i++){ inv[i] = powmod(i,mod-2) * inv[i-1]; } } // 階乗のmodを配列に格納 void g(){ fac[0] = 1 ; fac[1] = 1 ; for(ll i = 2 ; i <= MAX_N ; i++){ fac[i] = fac[i-1] * i; } } //nCrの計算 modint combination(ll n , ll r){ if(n < 0 || r < 0 || n < r) return 0 ; return fac[n] * inv[n-r] * inv[r]; } modint permutation(ll n , ll r){ if(n < 0 || r < 0 || n < r) return 0 ; return fac[n] * inv[n-r]; } void init(){ f() ; g() ; } ll n, a, b; int main(){ fast_input_output init(); cin >> n >> a >> b; modint res = permutation(n,n); if(a == b){ res -= permutation(n-1,n-1) * 2; } else{ res -= permutation(n-1,n-1) * 2 - permutation(n-2,n-2); } cout << res << endl; }