結果

問題 No.2254 Reverse Only
ユーザー kaikeykaikey
提出日時 2023-03-24 22:18:38
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 87 ms / 2,000 ms
コード長 5,743 bytes
コンパイル時間 2,382 ms
コンパイル使用メモリ 217,420 KB
実行使用メモリ 17,360 KB
最終ジャッジ日時 2023-10-18 21:12:51
合計ジャッジ時間 6,182 ms
ジャッジサーバーID
(参考情報)
judge15 / judge14
このコードへのチャレンジ
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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 2 ms
4,348 KB
testcase_01 AC 2 ms
4,348 KB
testcase_02 AC 2 ms
4,348 KB
testcase_03 AC 2 ms
4,348 KB
testcase_04 AC 2 ms
4,348 KB
testcase_05 AC 2 ms
4,348 KB
testcase_06 AC 2 ms
4,348 KB
testcase_07 AC 2 ms
4,348 KB
testcase_08 AC 74 ms
9,396 KB
testcase_09 AC 87 ms
17,360 KB
testcase_10 AC 46 ms
9,396 KB
testcase_11 AC 73 ms
9,396 KB
testcase_12 AC 73 ms
9,396 KB
testcase_13 AC 74 ms
9,396 KB
testcase_14 AC 74 ms
9,396 KB
testcase_15 AC 74 ms
9,396 KB
testcase_16 AC 85 ms
17,360 KB
testcase_17 AC 87 ms
17,356 KB
testcase_18 AC 74 ms
9,396 KB
testcase_19 AC 58 ms
9,396 KB
testcase_20 AC 72 ms
17,360 KB
testcase_21 AC 72 ms
17,360 KB
testcase_22 AC 45 ms
17,356 KB
testcase_23 AC 59 ms
17,356 KB
testcase_24 AC 56 ms
17,360 KB
testcase_25 AC 59 ms
17,360 KB
testcase_26 AC 59 ms
17,360 KB
testcase_27 AC 4 ms
4,348 KB
testcase_28 AC 16 ms
4,564 KB
testcase_29 AC 34 ms
6,132 KB
testcase_30 AC 30 ms
5,684 KB
testcase_31 AC 17 ms
4,612 KB
testcase_32 AC 19 ms
4,972 KB
testcase_33 AC 10 ms
4,348 KB
testcase_34 AC 44 ms
7,076 KB
testcase_35 AC 29 ms
5,620 KB
testcase_36 AC 62 ms
8,652 KB
testcase_37 AC 65 ms
8,764 KB
testcase_38 AC 14 ms
4,452 KB
testcase_39 AC 57 ms
8,196 KB
testcase_40 AC 3 ms
4,348 KB
testcase_41 AC 26 ms
5,500 KB
testcase_42 AC 16 ms
4,508 KB
testcase_43 AC 47 ms
7,212 KB
testcase_44 AC 69 ms
9,196 KB
testcase_45 AC 42 ms
6,764 KB
testcase_46 AC 3 ms
4,348 KB
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 #

#include "bits/stdc++.h"
#include <random>
#include <chrono>
#define ALL(x) (x).begin(), (x).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define SZ(x) ((lint)(x).size())
#define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;++i)
#define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;--i)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
#define endk '\n'
using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef double ld; typedef pair<lint, lint> plint; typedef pair<ld, ld> pld;
struct fast_ios { fast_ios() { cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(30); }; } fast_ios_;
template<class T> auto add = [](T a, T b) -> T { return a + b; };
template<class T> auto mul = [](T a, T b) -> T { return a * b; };
template<class T> auto f_max = [](T a, T b) -> T { return max(a, b); };
template<class T> auto f_min = [](T a, T b) -> T { return min(a, b); };
template<class T> using V = vector<T>;
using Vl = V<lint>; using VVl = V<Vl>; using VVVl = V<V<Vl>>;
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 != v.size() ? " " : "");
	return os;
}
template< typename T >istream& operator>>(istream& is, vector< T >& v) {
	for (T& in : v) is >> in;
	return is;
}
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
template <class T>
T div_floor(T a, T b) {
	if (b < 0) a *= -1, b *= -1;
	return a >= 0 ? a / b : (a + 1) / b - 1;
}
template <class T>
T div_ceil(T a, T b) {
	if (b < 0) a *= -1, b *= -1;
	return a > 0 ? (a - 1) / b + 1 : a / b;
}
template <class F> struct rec {
	F f;
	rec(F&& f_) : f(std::forward<F>(f_)) {}
	template <class... Args> auto operator()(Args &&... args) const {
		return f(*this, std::forward<Args>(args)...);
	}
};
//lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); }
lint digit(lint a) { return (lint)log10(a); }
lint e_dist(plint a, plint b) { return abs(a.first - b.first) * abs(a.first - b.first) + abs(a.second - b.second) * abs(a.second - b.second); }
lint m_dist(plint a, plint b) { return abs(a.first - b.first) + abs(a.second - b.second); }
bool check_overflow(lint a, lint b, lint limit) { if (b == 0) return false; return a > limit / b; } // a * b > c => true
void Worshall_Floyd(VVl& g) { REP(k, SZ(g)) REP(i, SZ(g)) REP(j, SZ(g)) chmin(g[i][j], g[i][k] + g[k][j]); }
const long long MOD1000000007 = 1000000007, MOD998244353 = 998244353, INF = 1e18;
lint dx[8] = { 0, 1, 0, -1, 1, -1, 1, -1 }, dy[8] = { 1, 0, -1, 0, -1, -1, 1, 1 };
bool YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; return flag; } bool yn(bool flag) { cout << (flag ? "Yes" : "No") << endk; return flag; }
struct Edge {
	lint from, to;
	lint cost;
	Edge() {

	}
	Edge(lint u, lint v, lint c) {
		cost = c;
		from = u;
		to = v;
	}
	bool operator<(const Edge& e) const {
		return cost < e.cost;
	}
};
struct WeightedEdge {
	lint to;
	lint cost;
	WeightedEdge(lint v, lint c) {
		to = v;
		cost = c;
	}
	bool operator<(const WeightedEdge& e) const {
		return cost < e.cost;
	}
};
using WeightedGraph = V<V<WeightedEdge>>;
typedef pair<plint, lint> tlint;
typedef pair<ld, ld> pld;
typedef pair<plint, plint> qlint;
typedef pair<plint, char> vstr;
typedef pair<lint, Vl> valv;

struct RollingHash {
	const _ulong MASK30 = (1ULL << 30) - 1;
	const _ulong MASK31 = (1ULL << 31) - 1;
	const _ulong MOD = (1ULL << 61) - 1;
	const _ulong MASK61 = MOD;

	vector<_ulong> hashed, power;

	RollingHash(const Vl& s, _ulong base) {
		int sz = SZ(s);
		hashed.assign(sz + 1, 0);
		power.assign(sz + 1, 0);
		power[0] = 1;
		for (int i = 0; i < sz; i++) {
			power[i + 1] = mul(power[i], base);
			hashed[i + 1] = mul(hashed[i], base) + s[i];
			if (hashed[i + 1] >= MOD) hashed[i + 1] -= MOD;
		}
	}

	//乱数生成、main関数にコピペする
	void generate_base() {
		_ulong base;
		{
			//乱数生成
			random_device seed_gen;
			mt19937 engine(seed_gen());
			uniform_real_distribution<> dist1(129, INT_MAX);
			base = dist1(engine);
		}
	}

	_ulong get(int l, int r) const {
		_ulong ret = hashed[r] + MOD - mul(hashed[l], power[r - l]);
		if (ret >= MOD) ret -= MOD;
		return ret;
	}

	//a*b mod 2^61-1を返す関数
	inline _ulong mul(_ulong a, _ulong b) const {
		_ulong u_a = a >> 31;//aの31bit以降
		_ulong d_a = a & MASK31;//aの31bit未満
		_ulong u_b = b >> 31;
		_ulong d_b = b & MASK31;

		_ulong mid = d_a * u_b + u_a * d_b;
		_ulong u_mid = mid >> 30;
		_ulong d_mid = mid & MASK30;
		return CalcMod(u_a * u_b * 2 + u_mid + (d_mid << 31) + d_a * d_b);
	}

	//mod 2^61-1を返す関数
	inline _ulong CalcMod(_ulong x) const {
		_ulong u_x = x >> 61;
		_ulong d_x = x & MASK61;
		_ulong res = u_x + d_x;
		if (res >= MOD) res -= MOD;
		return res;
	}
};

int main() {
	lint N, K;
	cin >> N >> K;
	VVl arr(2, Vl(N));
	cin >> arr;

	{
		VVl _arr = arr;
		sort(ALL(_arr[0]));
		sort(ALL(_arr[1]));
		if (_arr[0] != _arr[1]) {
			yn(false);
			return 0;
		}
	}

	if (arr[0] == arr[1]) {
		yn(true);
	}
	else if (N == K) {
		reverse(ALL(arr[1]));
		yn(arr[0] == arr[1]);
	}
	else {
		if (K == N - 1) {
			_ulong base;
			{
				//乱数生成
				random_device seed_gen;
				mt19937 engine(seed_gen());
				uniform_real_distribution<> dist1(129, INT_MAX);
				base = dist1(engine);
			}
			REP(i, N) arr[1].push_back(arr[1][i]);
			RollingHash rh1(arr[0], base), rh2(arr[1], base);
			REP(i, N + 1) {
				if (rh1.get(0, N) == rh2.get(i, N + i)) {
					yn(true);
					return 0;
				}
			}
			yn(false);
		}
		else {
			yn(K < N - 1);
		}
	}
}

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