結果
問題 | No.2250 Split Permutation |
ユーザー |
|
提出日時 | 2023-03-24 14:17:42 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 2,305 bytes |
コンパイル時間 | 4,158 ms |
コンパイル使用メモリ | 240,900 KB |
実行使用メモリ | 16,412 KB |
最終ジャッジ日時 | 2024-09-18 16:25:41 |
合計ジャッジ時間 | 9,482 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 22 TLE * 5 -- * 8 |
ソースコード
#include <bits/stdc++.h>#include <atcoder/all>#define pub push_back#define eb emplace_back#define mp make_pair#define fi first#define se second#define rep(i, n) rep2(i, 0, n)#define rep2(i, m, n) for (ll i = m; i < (n); i++)#define per(i, b) per2(i, 0, b)#define per2(i, a, b) for (ll i = int(b) - 1; i >= int(a); i--)#define ALL(c) (c).begin(), (c).end()using namespace std;using namespace atcoder;using ll = long long; using dd = double;using Pll = pair<ll, ll>;using vll = vector< ll>; using vdd = vector< dd>;using vvll = vector< vll>; using vvdd = vector<vdd>;using vvvll = vector< vvll>; using vvvdd = vector<vvdd>;using vvvvll = vector<vvvll>;using vchar = vector< char>;using vvchar = vector<vchar>;using mint = modint998244353;using mint2 = modint1000000007;using vmint = vector< mint>; using vmint2 = vector< mint2>;using vvmint = vector<vmint>; using vvmint2 = vector<vmint2>;constexpr long long INF = (1LL << 60);constexpr double EPS = 1e-9;constexpr double PI = 3.141592653589;//////////////////////////////////////////////////////////template <typename T>bool chmax(T& a, const T& b) {if (a < b) {a = b; // aをbで更新return true;}return false;}template <typename T>bool chmin(T& a, const T& b) {if (a > b) {a = b; // aをbで更新return true;}return false;}template <typename T>T sq(T x) {return x * x;}std::string zfill(int n, const int width){std::stringstream ss;ss << std::setw(width) << std::setfill('0') << n;return ss.str();}using S = mint;using F = mint;S op(S l, S r) { return l + r; }S e() { return 0; }S mapping(F l, S r) { return r / l; }F composition(F l, F r) { return l * r; }F id() { return 1; }int main() {//cout << fixed << setprecision(10);ios::sync_with_stdio(false);cin.tie(nullptr);ll N; cin >> N;vll P(N);rep(i, N) {cin >> P[i];}mint ans = 0;fenwick_tree<mint> fen(N + 1);vmint v(N + 1);lazy_segtree<S, op, e, F, mapping, composition, id> seg(v);mint pm = pow_mod(2, N - 1, 998244353);rep(i, N) {mint sum = fen.sum(P[i], N + 1);sum *= pm;ans += sum;fen.add(P[i], 1);mint sum2 = seg.prod(P[i], N + 1);sum2 *= pm;ans -= sum2;seg.set(P[i], 1);seg.apply(0, N + 1, 2);}cout << ans.val() << endl;}