結果
問題 | No.2383 Naphthol |
ユーザー | cn_449 |
提出日時 | 2023-07-14 22:39:28 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 4,204 bytes |
コンパイル時間 | 4,346 ms |
コンパイル使用メモリ | 208,492 KB |
実行使用メモリ | 7,168 KB |
最終ジャッジ日時 | 2024-09-16 07:43:43 |
合計ジャッジ時間 | 7,133 ms |
ジャッジサーバーID (参考情報) |
judge5 / 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 | 12 ms
6,784 KB |
testcase_01 | RE | - |
testcase_02 | AC | 12 ms
6,912 KB |
testcase_03 | WA | - |
testcase_04 | RE | - |
testcase_05 | WA | - |
testcase_06 | RE | - |
testcase_07 | WA | - |
testcase_08 | RE | - |
testcase_09 | AC | 12 ms
6,784 KB |
testcase_10 | RE | - |
testcase_11 | RE | - |
testcase_12 | RE | - |
testcase_13 | RE | - |
testcase_14 | AC | 12 ms
6,912 KB |
testcase_15 | AC | 12 ms
6,912 KB |
testcase_16 | RE | - |
testcase_17 | AC | 12 ms
6,912 KB |
testcase_18 | AC | 12 ms
6,912 KB |
testcase_19 | RE | - |
testcase_20 | RE | - |
ソースコード
#include <iostream> #include <vector> #include <algorithm> #include <cmath> #include <string> #include <queue> #include <stack> #include <set> #include <map> #include <iomanip> #include <utility> #include <tuple> #include <functional> #include <bitset> #include <cassert> #include <complex> #include <stdio.h> #include <time.h> #include <numeric> #include <random> #include <unordered_set> #include <unordered_map> #define all(a) (a).begin(), (a).end() #define rep(i, n) for (ll i = 0; i < (n); i++) #define req(i, a, b) for (ll i = (a); i < (b); i++) #define pb push_back #define debug(x) cerr << __LINE__ << ' ' << #x << ':' << (x) << '\n' #define debug2(x, y) cerr << __LINE__ << ' ' << #x << ':' << (x) << ',' << #y << ':' << (y) << '\n' #define debug3(x, y, z) cerr << __LINE__ << ' ' << #x << ':' << (x) << ',' << #y << ':' << (y) << ',' << #z << ':' << (z) << '\n' #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") using namespace std; typedef long long ll; typedef unsigned int uint; typedef unsigned long long ull; typedef long double ld; template<class T> using P = pair<T, T>; template<class T> using pri_s = priority_queue<T, vector<T>, greater<T>>; template<class T> using pri_b = priority_queue<T>; constexpr int inf = 1000000010; constexpr int inf2 = 2000000010; constexpr ll INF = 1000000000000000010; constexpr ll INF4 = 4000000000000000010; constexpr int mod1e9 = 1000000007; constexpr int mod998 = 998244353; constexpr ld eps = 1e-12; constexpr ld pi = 3.141592653589793238; constexpr ll ten(int n) { return n ? 10 * ten(n - 1) : 1; }; int dx[] = { 1,0,-1,0,1,1,-1,-1,0 }; int dy[] = { 0,1,0,-1,1,-1,1,-1,0 }; ll mul(ll a, ll b) { return (b != 0 && a > INF / b ? INF : a * b); } void fail() { cout << "-1\n"; exit(0); } void no() { cout << "No\n"; exit(0); } template<class T> void er(T a) { cout << a << '\n'; exit(0); } template<class T, class U> inline bool chmax(T &a, const U &b) { if (a < b) { a = b; return true; } return false; } template<class T, class U> inline bool chmin(T &a, const U &b) { if (a > b) { a = b; return true; } return false; } template<class T> istream &operator >>(istream &s, vector<T> &v) { for (auto &e : v) s >> e; return s; } template<class T> ostream &operator <<(ostream &s, const vector<T> &v) { for (auto &e : v) s << e << ' '; return s; } template<class T, class U> ostream &operator << (ostream &s, const pair<T, U> &p) { s << p.first << ' ' << p.second; return s; } struct fastio { fastio() { cin.tie(0); cout.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); cerr << fixed << setprecision(20); } }fastio_; #include <atcoder/all> using namespace atcoder; constexpr ll mod = mod998; using mint = static_modint<mod>; istream &operator >>(istream &s, mint &m) { ll y; s >> y; m = y; return s; } ostream &operator <<(ostream &s, mint &m) { return s << m.val(); } ostream &operator <<(ostream &s, const vector<mint> &v) { for (auto &e : v) s << e.val() << ' '; return s; } vector<mint> fac, inv, facinv; void modcalc(int n) { fac.resize(n); inv.resize(n); facinv.resize(n); fac[0] = 1; fac[1] = 1; inv[1] = 1; facinv[0] = 1; facinv[1] = 1; for (ll i = 2; i < n; i++) { fac[i] = fac[i - 1] * i; inv[i] = -inv[mod % i] * (mod / i); facinv[i] = facinv[i - 1] * inv[i]; } } mint comb(ll n, ll k) { if (n < 0 || k < 0 || n < k) return 0; return fac[n] * facinv[k] * facinv[n - k]; } mint perm(ll n, ll k) { if (n < 0 || k < 0 || n < k) return 0; return fac[n] * facinv[n - k]; } mint hom(ll n, ll k) { if (n < 0 || k < 0 || n == 0 && k > 0) return 0; if (n == 0 && k == 0) return 1; return fac[n + k - 1] * facinv[k] * facinv[n - 1]; } int main() { modcalc(300000); ll n, k; cin >> n >> k; assert(k % 2 == 1); mint a = 0, b = 0, c = 0; if(k % 4 == 0 or (n % 2 == 1 && k % 2 == 0)) c = comb(n / 2 + 1, k / 4); if(n % 2 == 0){ if(k % 2 == 0) b += comb(n + 2, k / 2) - c; } else{ if(k % 2 == 0) { b += comb(n + 1, k / 2) - c; b += comb(n + 1, k / 2 - 1) - c; } else{ b += comb(n + 1, k / 2); } } b *= 2; if(k % 2 == 0) b += comb(n + 2, k / 2) - c; a = comb(2 * n + 4, k); a -= b + c; mint ans = a * inv[4] + b * inv[2] + c; cout << ans << '\n'; }