#729236 (C++17) No.1834 1D Gravity

提出ソース

結果

問題	No.1834 1D Gravity
ユーザー	cn_449
提出日時	2022-01-08 15:12:44
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	WA
実行時間	-
コード長	10,183 bytes
コンパイル時間	2,345 ms
コンパイル使用メモリ	166,652 KB
実行使用メモリ	7,780 KB
最終ジャッジ日時	2024-11-14 09:26:53
合計ジャッジ時間	4,008 ms
ジャッジサーバーID （参考情報）	judge5 / judge2

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	WA	-
testcase_01	WA	-
testcase_02	WA	-
testcase_03	WA	-
testcase_04	WA	-
testcase_05	WA	-
testcase_06	WA	-
testcase_07	AC	2 ms 6,820 KB
testcase_08	WA	-
testcase_09	WA	-
testcase_10	WA	-
testcase_11	WA	-
testcase_12	WA	-
testcase_13	WA	-
testcase_14	WA	-
testcase_15	WA	-
testcase_16	WA	-
testcase_17	WA	-
testcase_18	WA	-
testcase_19	WA	-
testcase_20	WA	-
testcase_21	WA	-
testcase_22	WA	-
testcase_23	WA	-
testcase_24	WA	-
testcase_25	WA	-
testcase_26	WA	-
testcase_27	WA	-
testcase_28	WA	-

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ソースコード

raw source code

#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 rep(i, n) for (int i = 0; i < (n); i++)
#define range(i, a, b) for (ll i = (a); i < (b); i++)
#define pb push_back
#define debug(x) cerr << __LINE__ << ' ' << #x << ':' << (x) << '\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;
typedef pair<ll, ll> P;
typedef pair<ll, P> Q;
//typedef complex<ld> com;
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 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 }; int dy[] = { 0,1,0,-1,1,-1,1,-1 };
ll mul(ll a, ll b) { return (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_;

ll ppow(ll a, ll b, ll mod) {
	ll res = 1;
	while (b) {
		if (b & 1) res *= a, res %= mod;
		a *= a, a %= mod;
		b >>= 1;
	}
	return res;
}

int find(int p) {
	random_device seed_gen;
	mt19937_64 engine(seed_gen());
	vector<int> div;
	for (int i = 1; i * i <= p - 1; i++) {
		if ((p - 1) % i == 0) {
			div.pb(i);
			if (i != 1 && i * i != p - 1) div.pb((p - 1) / i);
		}
	}
	while (1) {
		int r = engine() % p;
		if (r == 0) continue;
		bool f = true;
		for (int d : div) {
			if (ppow(r, d, p) == 1) f = false;
		}
		if (f) return r;
	}
}

ll modinv(ll a, ll mod) {
	a %= mod;
	if (a == 0) abort();
	ll b = mod, u = 1, v = 0;
	while (b) {
		ll t = a / b;
		a -= t * b; swap(a, b);
		u -= t * v; swap(u, v);
	}
	u %= mod;
	if (u < 0) u += mod;
	return u;
}

int log(ll n, ll p, ll r) {
	ll s = sqrt(p) + 1;
	unordered_map<ll, ll> big, small;
	rep(i, s) small[ppow(r, i, p)] = i;
	rep(i, s) big[ppow(r, i * s, p)] = i * s;
	rep(i, s) {
		ll v = ppow(r, i, p);
		ll nn = n * modinv(v, p) % p;
		if (big.count(nn)) {
			return (i + big[nn]) % (p - 1);
		}
	}
	abort();
}

constexpr ll mod = mod998;
template <int mod> class modint {
public:
	int n;
	modint() : n(0) {};
	modint(ll n_) {
		n = n_ % mod;
		if (n < 0) n += mod;
	}
	modint operator -() const { return n > 0 ? mod - n : -n; }
	bool operator == (const modint &m) const { return n == m.n; }
	bool operator != (const modint &m) const { return n != m.n; }
	modint &operator += (const modint &m) { n += m.n; if (n >= mod) n -= mod; return *this; }
	modint &operator -= (const modint &m) { n -= m.n; if (n < 0) n += mod; return *this; }
	modint &operator *= (const modint &m) { n = ll(n) * m.n % mod; return *this; }
	modint &operator /= (const modint &m) { n = ll(n) * modinv(m).n % mod; return *this; }
	modint operator +(modint m) const { return modint(*this) += m; }
	modint operator -(modint m) const { return modint(*this) -= m; }
	modint operator *(modint m) const { return modint(*this) *= m; }
	modint operator /(modint m) const { return modint(*this) /= m; }
	modint &operator ++ () { *this += 1; return *this; }
	modint operator ++ (int) { *this += 1; return *this - 1; }
	modint &operator -- () { *this -= 1; return *this; }
	modint operator -- (int) { *this -= 1; return *this + 1; }
	modint pow(ll b) const {
		modint res = 1, a = modint(*this);
		while (b) {
			if (b & 1) res *= a;
			a *= a;
			b >>= 1;
		}
		return res;
	}
	friend istream &operator >> (istream &s, modint<mod> &a) { s >> a.n; return s; }
	friend ostream &operator << (ostream &s, modint<mod> &a) { s << a.n; return s; }
};

using mint = modint<mod>;
vector<mint> fac, inv, facinv;

mint modinv(mint x) {
	ll a = x.n;
	if (a == 0) abort();
	if (a < (ll)inv.size()) return inv[a];
	ll b = mod, u = 1, v = 0;
	while (b) {
		ll t = a / b;
		a -= t * b; swap(a, b);
		u -= t * v; swap(u, v);
	}
	mint res = u;
	return res;
}

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];
}

template<class T> class segtree {
	int n;
	vector<T> data;
	T id = 0;
	T operation(T a, T b) { return a + b; }
public:
	segtree(int _n) {
		n = 1;
		while (n < _n + 2) n <<= 1;
		data = vector<T>(2 * n, id);
	}
	segtree(vector<T> vec) {
		int _n = vec.size();
		n = 1;
		while (n < _n + 2) n <<= 1;
		data = vector<T>(2 * n, id);
		for (int i = 0; i < _n; i++) data[i + n] = vec[i];
		for (int i = n - 1; i >= 1; i--) data[i] = operation(data[i << 1], data[i << 1 | 1]);
	}
	void change(int i, T x) {
		i += n;
		data[i] = x;
		while (i > 1) {
			i >>= 1;
			data[i] = operation(data[i << 1], data[i << 1 | 1]);
		}
	}
	void add(int i, T x) { change(i, data[i + n] + x); }
	T get(int a, int b) {
		T left = id; T right = id;
		a += n; b += n;
		while (a < b) {
			if (a & 1) left = operation(left, data[a++]);
			if (b & 1) right = operation(data[--b], right);
			a >>= 1; b >>= 1;
		}
		return operation(left, right);
	}
	T get_all() { return data[1]; }
	T operator[](int i) { return data[i + n]; }
};

class unionfind {
	vector<int> par;
	vector<int> sz;
public:
	unionfind(int n) {
		par = vector<int>(n);
		for (int i = 0; i < n; i++) par[i] = i;
		sz = vector<int>(n, 1);
	}
	int find(int x) {
		if (par[x] == x) return x;
		else return par[x] = find(par[x]);
	}
	int size(int x) { return sz[find(x)]; }
	bool same(int x, int y) { return find(x) == find(y); }
	void unite(int x, int y) {
		x = find(x);
		y = find(y);
		if (x == y) return;
		if (sz[x] < sz[y]) {
			par[x] = y;
			sz[y] += sz[x];
		}
		else {
			par[y] = x;
			sz[x] += sz[y];
		}
	}
};

template<class T> vector<vector<T>> mat_mul(vector<vector<T>> a, vector<vector<T>> b) {
	int n = a.size();
	vector<vector<T>> ans(n, vector<T>(n));
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			for (int k = 0; k < n; k++) {
				ans[i][j] += a[i][k] * b[k][j];
			}
		}
	}
	return ans;
}

template<class T> vector<vector<T>> mat_pow(vector<vector<T>> a, ll b) {
	int n = a.size();
	vector<vector<T>> ans(n, vector<T>(n));
	for (int i = 0; i < n; i++) ans[i][i] = 1;
	while (b) {
		if (b & 1) ans = mat_mul(ans, a);
		a = mat_mul(a, a);
		b >>= 1;
	}
	return ans;
}

vector<ll> shrink(vector<ll> vec) {
	int vecsize = vec.size();
	vector<ll> tmpvec = vec;
	sort(tmpvec.begin(), tmpvec.end());
	tmpvec.erase(unique(tmpvec.begin(), tmpvec.end()), tmpvec.end());
	vector<ll> res(vecsize);
	for (int i = 0; i < vecsize; i++) res[i] = lower_bound(tmpvec.begin(), tmpvec.end(), vec[i]) - tmpvec.begin();
	return res;
}
const int N = 2010;
vector<vector<int>> graph(N, vector<int>());
vector<vector<mint>> dp(N, vector<mint>());

vector<mint> conv(vector<mint> a, vector<mint> b) {
	int as = a.size(); int bs = b.size();
	vector<mint> res(as + bs - 1);
	rep(i, as) {
		rep(j, bs) {
			res[i + j] += a[i] * b[j];
		}
	}
	return res;
}

void dfs(int n) {
	vector<mint> tmp = { 1 };
	for (int i : graph[n]) {
		dfs(i);
		tmp = conv(tmp, dp[i]);
	}
	int s = tmp.size();
	dp[n].resize(s + 1);
	rep(i, s) {
		dp[n][i] += tmp[i];
		dp[n][i + 1] += tmp[i] * (s - i - 1);
	}
}

int main() {
	int n;
	cin >> n;
	vector<int> a(n);
	rep(i, n) {
		cin >> a[i];
		a[i]--;
	}
	if (n == 2) {
		cout << 0 << ' ' << 1 << '\n';
		return 0;
	}
	vector<int> b(n, -1);
	chmax(b[1], a[0]);
	chmax(b[n - 2], a[n - 1]);
	for (int i = 1; i < n - 1; i++) {
		if (a[i - 1] < a[i + 1]) chmax(b[i + 1], a[i]);
		else chmax(b[i - 1], a[i]);
	}
	vector<vector<int>> v;
	vector<int> tmp;
	rep(i, n) {
		if (b[i] == -1) {
			if (tmp.size() != 0) v.pb(tmp);
			tmp.clear();
		}
		else tmp.pb(b[i]);
	}
	if (tmp.size() != 0) v.pb(tmp);
	int ans = 0;
	v.pb({ 3,1,2,4 });
	for (vector<int> w : v) {
		int cnt = 0;
		int sz = w.size();
		int x = 0;
		for (int i = 2; i < sz; i += 2) {
			if (w[i - 2] < w[i]) x = i / 2;
		}
		int y = 0;
		for (int i = 3; i < sz; i += 2) {
			if (w[i - 2] < w[i]) y = i / 2;
		}
		//debug(w);
		int xs = (sz + 1) / 2;
		int ys = sz / 2;
		while (xs > 1 || ys > 1) {
			//debug(xs); debug(ys); debug(x); debug(y);
			cnt++;
			int nx = x, ny = y;
			if (y >= x && x > 0) ny--;
			if (x > y) nx--;
			if (y + 1 != xs) xs--;
			if (x != 0) ys--;
			x = nx, y = ny;
			if (x == 0) {
				swap(x, y);
				swap(xs, ys);
			}
		}
		chmax(ans, cnt);
	}
	cout << ans + 1 << ' ' << v.size() << '\n';
}

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結果

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