結果

問題 No.2615 ペアの作り方
ユーザー dyktr_06
提出日時 2024-01-26 21:30:53
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 52 ms / 2,000 ms
コード長 9,475 bytes
コンパイル時間 4,565 ms
コンパイル使用メモリ 263,000 KB
最終ジャッジ日時 2025-02-18 22:59:15
ジャッジサーバーID
(参考情報)
judge2 / judge3
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
other AC * 21
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define overload4(_1, _2, _3, _4, name, ...) name
#define rep1(n) for(int i = 0; i < (int)(n); ++i)
#define rep2(i, n) for(int i = 0; i < (int)(n); ++i)
#define rep3(i, a, b) for(int i = (a); i < (int)(b); ++i)
#define rep4(i, a, b, c) for(int i = (a); i < (int)(b); i += (c))
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; --i)
#define ALL(a) (a).begin(), (a).end()
#define Sort(a) (sort((a).begin(), (a).end()))
#define RSort(a) (sort((a).rbegin(), (a).rend()))
#define UNIQUE(a) (a.erase(unique((a).begin(), (a).end()), (a).end()))
typedef long long int ll;
typedef unsigned long long ul;
typedef long double ld;
typedef vector<int> vi;
typedef vector<long long> vll;
typedef vector<char> vc;
typedef vector<string> vst;
typedef vector<double> vd;
typedef vector<long double> vld;
typedef pair<long long, long long> P;
template<class T> long long sum(const T& a){ return accumulate(a.begin(), a.end(), 0LL); }
template<class T> auto min(const T& a){ return *min_element(a.begin(), a.end()); }
template<class T> auto max(const T& a){ return *max_element(a.begin(), a.end()); }
const long long MINF = 0x7fffffffffff;
const long long INF = 0x1fffffffffffffff;
const long long MOD = 998244353;
const long double EPS = 1e-9;
const long double PI = acos(-1);
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
template<typename T1, typename T2> istream &operator>>(istream &is, pair<T1, T2> &p){ is >> p.first >> p.second; return is; }
template<typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &p){ os << "(" << p.first << ", " << p.second << ")"; return
    os; }
template<typename T> istream &operator>>(istream &is, vector<T> &v){ for(T &in : v) is >> in; return is; }
template<typename T> ostream &operator<<(ostream &os, const vector<T> &v){ for(int i = 0; i < (int) v.size(); ++i){ os << v[i] << (i + 1 != (int) v
    .size() ? " " : ""); } return os; }
template <typename T, typename S> ostream &operator<<(ostream &os, const map<T, S> &mp){ for(auto &[key, val] : mp){ os << key << ":" << val << " ";
    } return os; }
template <typename T> ostream &operator<<(ostream &os, const set<T> &st){ auto itr = st.begin(); for(int i = 0; i < (int)st.size(); ++i){ os << *itr
    << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; }
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &st){ auto itr = st.begin(); for(int i = 0; i < (int)st.size(); ++i){ os <<
    *itr << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; }
template <typename T> ostream &operator<<(ostream &os, queue<T> q){ while(q.size()){ os << q.front() << " "; q.pop(); } return os; }
template <typename T> ostream &operator<<(ostream &os, deque<T> q){ while(q.size()){ os << q.front() << " "; q.pop_front(); } return os; }
template <typename T> ostream &operator<<(ostream &os, stack<T> st){ while(st.size()){ os << st.top() << " "; st.pop(); } return os; }
template <class T, class Container, class Compare> ostream &operator<<(ostream &os, priority_queue<T, Container, Compare> pq){ while(pq.size()){ os
    << pq.top() << " "; pq.pop(); } return os; }
template<class T, class U> inline T vin(T& vec, U n) { vec.resize(n); for(int i = 0; i < (int) n; ++i) cin >> vec[i]; return vec; }
template<class T> inline void vout(T vec, string s = "\n"){ for(auto x : vec) cout << x << s; }
template<class... T> void in(T&... a){ (cin >> ... >> a); }
void out(){ cout << '\n'; }
template<class T, class... Ts> void out(const T& a, const Ts&... b){ cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; }
template<class T, class U> void inGraph(vector<vector<T>>& G, U n, U m, bool directed = false){ G.resize(n); for(int i = 0; i < m; ++i){ int a, b;
    cin >> a >> b; a--, b--; G[a].push_back(b); if(!directed) G[b].push_back(a); } }
template <long long Modulus>
struct ModInt{
long long val;
constexpr ModInt(const long long _val = 0) noexcept : val(_val) {
normalize();
}
void normalize(){
val = (val % Modulus + Modulus) % Modulus;
}
inline ModInt& operator+=(const ModInt& rhs) noexcept {
if(val += rhs.val, val >= Modulus) val -= Modulus;
return *this;
}
inline ModInt& operator-=(const ModInt& rhs) noexcept {
if(val -= rhs.val, val < 0) val += Modulus;
return *this;
}
inline ModInt& operator*=(const ModInt& rhs) noexcept {
val = val * rhs.val % Modulus;
return *this;
}
inline ModInt& operator/=(const ModInt& rhs) noexcept {
val = val * inv(rhs.val).val % Modulus;
return *this;
}
inline ModInt& operator++() noexcept {
if(++val >= Modulus) val -= Modulus;
return *this;
}
inline ModInt operator++(int) noexcept {
ModInt t = val;
if(++val >= Modulus) val -= Modulus;
return t;
}
inline ModInt& operator--() noexcept {
if(--val < 0) val += Modulus;
return *this;
}
inline ModInt operator--(int) noexcept {
ModInt t = val;
if(--val < 0) val += Modulus;
return t;
}
inline ModInt operator-() const noexcept { return (Modulus - val) % Modulus; }
inline ModInt inv(void) const { return inv(val); }
ModInt pow(long long n){
assert(0 <= n);
ModInt x = *this, r = 1;
while(n){
if(n & 1) r *= x;
x *= x;
n >>= 1;
}
return r;
}
ModInt inv(const long long n) const {
long long a = n, b = Modulus, u = 1, v = 0;
while(b){
long long t = a / b;
a -= t * b; swap(a, b);
u -= t * v; swap(u, v);
}
u %= Modulus;
if(u < 0) u += Modulus;
return u;
}
friend inline ModInt operator+(const ModInt& lhs, const ModInt& rhs) noexcept { return ModInt(lhs) += rhs; }
friend inline ModInt operator-(const ModInt& lhs, const ModInt& rhs) noexcept { return ModInt(lhs) -= rhs; }
friend inline ModInt operator*(const ModInt& lhs, const ModInt& rhs) noexcept { return ModInt(lhs) *= rhs; }
friend inline ModInt operator/(const ModInt& lhs, const ModInt& rhs) noexcept { return ModInt(lhs) /= rhs; }
friend inline bool operator==(const ModInt& lhs, const ModInt& rhs) noexcept { return lhs.val == rhs.val; }
friend inline bool operator!=(const ModInt& lhs, const ModInt& rhs) noexcept { return lhs.val != rhs.val; }
friend inline istream& operator>>(istream& is, ModInt& x) noexcept {
is >> x.val;
x.normalize();
return is;
}
friend inline ostream& operator<<(ostream& os, const ModInt& x) noexcept { return os << x.val; }
};
using mint = ModInt<998244353>;
template <typename T>
struct Combination{
vector<T> memo, memoinv, inv;
Combination(const int N) : memo(N + 1), memoinv(N + 1), inv(N + 1){
T m = -1;
long long mod = (m.val + 1LL);
memo[0] = memo[1] = 1;
memoinv[0] = memoinv[1] = 1;
inv[1] = 1;
for(int i = 2; i <= N; ++i){
memo[i] = memo[i - 1] * i;
inv[i] = mod - inv[mod % i] * (mod / i);
memoinv[i] = memoinv[i - 1] * inv[i];
}
}
inline T fact(const long long n) const {
return memo[n];
}
inline T factinv(const long long n) const {
return memoinv[n];
}
inline T ncr(const long long n, const long long r) const {
if(n < r || r < 0) return 0;
return (memo[n] * memoinv[r]) * memoinv[n - r];
}
inline T npr(const long long n, const long long r) const {
if(n < r || r < 0) return 0;
return memo[n] * memoinv[n - r];
}
inline T nhr(const long long n, const long long r) const {
if(n == 0 && r == 0) return 1;
return ncr(n + r - 1, r);
}
};
struct UnionFind{
vector<int> par;
vector<int> edg;
UnionFind(int N) : par(N), edg(N){
for(int i = 0; i < N; ++i){
par[i] = -1;
edg[i] = 0;
}
}
int root(int x){
if(par[x] < 0) return x;
return par[x] = root(par[x]);
}
void unite(int x, int y){
int rx = root(x);
int ry = root(y);
if(rx == ry){
edg[rx]++;
return;
}
par[ry] = par[rx] + par[ry];
par[rx] = ry;
edg[ry] += edg[rx] + 1;
}
bool same(int x, int y){
int rx = root(x);
int ry = root(y);
return rx == ry;
}
long long size(int x){
return -par[root(x)];
}
long long edge(int x){
return edg[root(x)];
}
};
ll n;
vll x, y;
void input(){
in(n);
vin(x, n);
vin(y, n);
}
void solve(){
Sort(x);
RSort(y);
UnionFind uf(n);
rep(i, n - 1){
ll s = min(x[i], y[i]) + min(x[i + 1], y[i + 1]);
ll t = min(x[i], y[i + 1]) + min(x[i + 1], y[i]);
if(s == t){
uf.unite(i, i + 1);
}
}
mint ans = 1;
Combination<mint> comb(n);
rep(i, n){
if(uf.root(i) == i) ans *= comb.fact(uf.size(i));
}
out(ans);
}
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout << fixed << setprecision(20);
input();
solve();
}
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