結果
問題 | No.2511 Mountain Sequence |
ユーザー | だれ |
提出日時 | 2023-10-20 22:39:24 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 22 ms / 2,000 ms |
コード長 | 7,736 bytes |
コンパイル時間 | 3,401 ms |
コンパイル使用メモリ | 198,832 KB |
実行使用メモリ | 11,196 KB |
最終ジャッジ日時 | 2024-09-20 20:29:53 |
合計ジャッジ時間 | 5,071 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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 | 19 ms
10,996 KB |
testcase_01 | AC | 21 ms
10,960 KB |
testcase_02 | AC | 21 ms
11,008 KB |
testcase_03 | AC | 20 ms
11,008 KB |
testcase_04 | AC | 20 ms
10,968 KB |
testcase_05 | AC | 20 ms
10,900 KB |
testcase_06 | AC | 21 ms
11,008 KB |
testcase_07 | AC | 21 ms
11,072 KB |
testcase_08 | AC | 20 ms
10,996 KB |
testcase_09 | AC | 20 ms
11,196 KB |
testcase_10 | AC | 20 ms
11,064 KB |
testcase_11 | AC | 20 ms
11,024 KB |
testcase_12 | AC | 19 ms
10,992 KB |
testcase_13 | AC | 21 ms
11,008 KB |
testcase_14 | AC | 20 ms
11,000 KB |
testcase_15 | AC | 21 ms
11,052 KB |
testcase_16 | AC | 20 ms
10,984 KB |
testcase_17 | AC | 21 ms
11,008 KB |
testcase_18 | AC | 21 ms
10,904 KB |
testcase_19 | AC | 22 ms
11,028 KB |
testcase_20 | AC | 22 ms
10,904 KB |
testcase_21 | AC | 21 ms
11,040 KB |
testcase_22 | AC | 21 ms
10,992 KB |
testcase_23 | AC | 20 ms
11,008 KB |
testcase_24 | AC | 21 ms
11,008 KB |
testcase_25 | AC | 21 ms
11,008 KB |
testcase_26 | AC | 21 ms
11,008 KB |
testcase_27 | AC | 21 ms
10,972 KB |
testcase_28 | AC | 21 ms
11,108 KB |
testcase_29 | AC | 21 ms
11,052 KB |
testcase_30 | AC | 22 ms
11,044 KB |
testcase_31 | AC | 21 ms
11,008 KB |
testcase_32 | AC | 22 ms
11,052 KB |
testcase_33 | AC | 21 ms
11,072 KB |
testcase_34 | AC | 21 ms
10,996 KB |
ソースコード
#include <algorithm> #include <bitset> #include <cassert> #include <cmath> #include <complex> #include <cstdio> #include <fstream> #include <functional> #include <iomanip> #include <iostream> #include <iterator> #include <map> #include <numeric> #include <queue> #include <random> #include <set> #include <sstream> #include <stack> #include <unordered_set> using namespace std; #if __has_include(<atcoder/all>) #include <atcoder/all> #endif #define GET_MACRO(_1, _2, _3, NAME, ...) NAME #define _rep(i, n) _rep2(i, 0, n) #define _rep2(i, a, b) for (int i = (int)(a); i < (int)(b); i++) #define rep(...) GET_MACRO(__VA_ARGS__, _rep2, _rep)(__VA_ARGS__) #define all(x) (x).begin(), (x).end() #define rall(x) (x).rbegin(), (x).rend() #define UNIQUE(x) \ std::sort((x).begin(), (x).end()); \ (x).erase(std::unique((x).begin(), (x).end()), (x).end()) using i64 = long long; template <class T, class U> bool chmin(T& a, const U& b) { return (b < a) ? (a = b, true) : false; } template <class T, class U> bool chmax(T& a, const U& b) { return (b > a) ? (a = b, true) : false; } inline void YesNo(bool f = 0, string yes = "Yes", string no = "No") { std::cout << (f ? yes : no) << "\n"; } namespace io { template <typename T> istream& operator>>(istream& i, vector<T>& v) { rep(j, v.size()) i >> v[j]; return i; } template <typename T> string join(vector<T>& v) { stringstream s; rep(i, v.size()) s << ' ' << v[i]; return s.str().substr(1); } template <typename T> ostream& operator<<(ostream& o, vector<T>& v) { if (v.size()) o << join(v); return o; } template <typename T> string join(vector<vector<T>>& vv) { string s = "\n"; rep(i, vv.size()) s += join(vv[i]) + "\n"; return s; } template <typename T> ostream& operator<<(ostream& o, vector<vector<T>>& vv) { if (vv.size()) o << join(vv); return o; } template <class T, class U> istream& operator>>(istream& i, pair<T, U>& p) { i >> p.first >> p.second; return i; } template <class T, class U> ostream& operator<<(ostream& o, pair<T, U>& p) { o << p.first << " " << p.second; return o; } void print() { cout << "\n"; } template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) { cout << head; if (sizeof...(tail)) cout << ' '; print(std::forward<Tail>(tail)...); } void in() {} template <class Head, class... Tail> void in(Head&& head, Tail&&... tail) { cin >> head; in(std::forward<Tail>(tail)...); } } // namespace io using namespace io; namespace useful { long long modpow(long long a, long long b, long long mod) { long long res = 1; while (b) { if (b & 1) res *= a, res %= mod; a *= a; a %= mod; b >>= 1; } return res; } bool is_pow2(long long x) { return x > 0 && (x & (x - 1)) == 0; } template <class T> void rearrange(vector<T>& a, vector<int>& p) { vector<T> b = a; for (int i = 0; i < int(a.size()); i++) { a[i] = b[p[i]]; } return; } template <class T> vector<pair<int, int>> rle_sequence(T& a) { vector<pair<int, int>> res; int n = a.size(); if (n == 1) return vector<pair<int, int>>{{a[0], 1}}; int l = 1; rep(i, n - 1) { if (a[i] == a[i + 1]) l++; else { res.emplace_back(a[i], l); l = 1; } } res.emplace_back(a.back(), l); return res; } vector<pair<char, int>> rle_string(string a) { vector<pair<char, int>> res; int n = a.size(); if (n == 1) return vector<pair<char, int>>{{a[0], 1}}; int l = 1; rep(i, n - 1) { if (a[i] == a[i + 1]) l++; else { res.emplace_back(a[i], l); l = 1; } } res.emplace_back(a.back(), l); return res; } vector<int> linear_sieve(int n) { vector<int> primes; vector<int> res(n + 1); iota(all(res), 0); for (int i = 2; i <= n; i++) { if (res[i] == i) primes.emplace_back(i); for (auto j : primes) { if (j * i > n) break; res[j * i] = j; } } return res; // return primes; } template <class T> vector<long long> dijkstra(vector<vector<pair<int, T>>>& graph, int start) { int n = graph.size(); vector<long long> res(n, 2e18); res[start] = 0; priority_queue<pair<long long, int>, vector<pair<long long, int>>, greater<pair<long long, int>>> que; que.push({0, start}); while (!que.empty()) { auto [c, v] = que.top(); que.pop(); if (res[v] < c) continue; for (auto [nxt, cost] : graph[v]) { auto x = c + cost; if (x < res[nxt]) { res[nxt] = x; que.push({x, nxt}); } } } return res; } } // namespace useful using namespace useful; 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 { return ModInt(*this); } 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); } int get() const { return x; } static constexpr int get_mod() { return mod; } }; using mint = ModInt<998244353>; vector<mint> fact_calc(int x) { vector<mint> res(x + 1); res[0] = 1; for (int i = 0; i < x; i++) { res[i + 1] = res[i] * (i + 1); } return res; } vector<mint> ifact_calc(int x) { vector<mint> res(x + 1); mint t = 1; for (int i = 1; i <= x; i++) { t *= i; } res[x] = t.inverse(); // res[x] = t.inv(); for (int i = x; i > 0; i--) { res[i - 1] = res[i] * i; } return res; } auto fact = fact_calc(1000005); auto ifact = ifact_calc(1000005); mint comb(int x, int y) { if (x < 0 || y < 0 || x - y < 0) return 0; return fact[x] * ifact[y] * ifact[x - y]; } mint perm(int x, int y) { if (x < 0 || x - y < 0) return 0; return fact[x] * ifact[x - y]; } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); mint ans = 0; int n, m; in(n, m); rep(k, 1, m + 1) { ans += comb(2 * (k - 1), n - 1); } print(ans); }