結果
問題 | No.2029 Swap Min Max Min |
ユーザー |
|
提出日時 | 2022-08-05 23:51:09 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 9,819 bytes |
コンパイル時間 | 4,280 ms |
コンパイル使用メモリ | 236,472 KB |
実行使用メモリ | 7,048 KB |
最終ジャッジ日時 | 2024-09-15 21:44:57 |
合計ジャッジ時間 | 47,252 ms |
ジャッジサーバーID (参考情報) |
judge6 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 34 WA * 4 TLE * 4 |
ソースコード
#ifndef HIDDEN_IN_VS // 折りたたみ用// 警告の抑制#define _CRT_SECURE_NO_WARNINGS// ライブラリの読み込み#include <bits/stdc++.h>using namespace std;// 型名の短縮using ll = long long; // -2^63 ~ 2^63 = 9 * 10^18(int は -2^31 ~ 2^31 = 2 * 10^9)using pii = pair<int, int>; using pll = pair<ll, ll>; using pil = pair<int, ll>; using pli = pair<ll, int>;using vi = vector<int>; using vvi = vector<vi>; using vvvi = vector<vvi>;using vl = vector<ll>; using vvl = vector<vl>; using vvvl = vector<vvl>;using vb = vector<bool>; using vvb = vector<vb>; using vvvb = vector<vvb>;using vc = vector<char>; using vvc = vector<vc>; using vvvc = vector<vvc>;using vd = vector<double>; using vvd = vector<vd>; using vvvd = vector<vvd>;template <class T> using priority_queue_rev = priority_queue<T, vector<T>, greater<T>>;using Graph = vvi;// 定数の定義const double PI = acos(-1);const vi DX = { 1, 0, -1, 0 }; // 4 近傍(下,右,上,左)const vi DY = { 0, 1, 0, -1 };int INF = 1001001001; ll INFL = 4004004004004004004LL;double EPS = 1e-16;// 入出力高速化struct fast_io { fast_io() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(18); } } fastIOtmp;// 汎用マクロの定義#define all(a) (a).begin(), (a).end()#define sz(x) ((int)(x).size())#define lbpos(a, x) (int)distance((a).begin(), std::lower_bound(all(a), x))#define ubpos(a, x) (int)distance((a).begin(), std::upper_bound(all(a), x))#define Yes(b) {cout << ((b) ? "Yes\n" : "No\n");}#define rep(i, n) for(int i = 0, i##_len = int(n); i < i##_len; ++i) // 0 から n-1 まで昇順#define repi(i, s, t) for(int i = int(s), i##_end = int(t); i <= i##_end; ++i) // s から t まで昇順#define repir(i, s, t) for(int i = int(s), i##_end = int(t); i >= i##_end; --i) // s から t まで降順#define repe(v, a) for(const auto& v : (a)) // a の全要素(変更不可能)#define repea(v, a) for(auto& v : (a)) // a の全要素(変更可能)#define repb(set, d) for(int set = 0; set < (1 << int(d)); ++set) // d ビット全探索(昇順)#define repp(a) sort(all(a)); for(bool a##_perm = true; a##_perm; a##_perm = next_permutation(all(a))) // a の順列全て(昇順)#define smod(n, m) ((((n) % (m)) + (m)) % (m)) // 非負mod#define uniq(a) {sort(all(a)); (a).erase(unique(all(a)), (a).end());} // 重複除去#define EXIT(a) {cout << (a) << endl; exit(0);} // 強制終了// 汎用関数の定義template <class T> inline ll pow(T n, int k) { ll v = 1; rep(i, k) v *= n; return v; }template <class T> inline bool chmax(T& M, const T& x) { if (M < x) { M = x; return true; } return false; } // 最大値を更新(更新されたら trueを返す)template <class T> inline bool chmin(T& m, const T& x) { if (m > x) { m = x; return true; } return false; } // 最小値を更新(更新されたら trueを返す)// 演算子オーバーロードtemplate <class T, class U> inline istream& operator>>(istream& is, pair<T, U>& p) { is >> p.first >> p.second; return is; }template <class T> inline istream& operator>>(istream& is, vector<T>& v) { repea(x, v) is >> x; return is; }template <class T> inline vector<T>& operator--(vector<T>& v) { repea(x, v) --x; return v; }template <class T> inline vector<T>& operator++(vector<T>& v) { repea(x, v) ++x; return v; }// 手元環境(Visual Studio)#ifdef _MSC_VER#include "local.hpp"// 提出用(gcc)#elseinline int popcount(int n) { return __builtin_popcount(n); }inline int popcount(ll n) { return __builtin_popcountll(n); }inline int lsb(int n) { return n != 0 ? __builtin_ctz(n) : -1; }inline int lsb(ll n) { return n != 0 ? __builtin_ctzll(n) : -1; }inline int msb(int n) { return n != 0 ? (31 - __builtin_clz(n)) : -1; }inline int msb(ll n) { return n != 0 ? (63 - __builtin_clzll(n)) : -1; }#define gcd __gcd#define dump(...)#define dumpel(v)#define dump_list(v)#define input_from_file(f)#define output_to_file(f)#define Assert(b) { if (!(b)) while (1) cout << "OLE"; }#endif#endif // 折りたたみ用//--------------AtCoder 専用--------------#include <atcoder/all>using namespace atcoder;//using mint = modint1000000007;using mint = modint998244353;//using mint = modint; // mint::set_mod(m);istream& operator>>(istream& is, mint& x) { ll x_; is >> x_; x = x_; return is; }ostream& operator<<(ostream& os, const mint& x) { os << x.val(); return os; }using vm = vector<mint>; using vvm = vector<vm>; using vvvm = vector<vvm>;//----------------------------------------//【最小 swap 回数】O(n)/** ビット列 s[0..n) に対し,隣接要素の swap を繰り返すことで t[0..n) に変化させるときの* swap の最小回数を返す(不可能なら INFL)*/ll swap_distance(const string& s, const string& t, char one = '1') {// verify : https://atcoder.jp/contests/tkppc6-2/tasks/tkppc6_2_bint n = sz(s);if (sz(t) != n) return INFL;// a[i] : s[0..n) における i 番目の 1 の位置// b[i] : t[0..n) における i 番目の 1 の位置vi a, b;rep(i, n) {if (s[i] == one) a.push_back(i);if (t[i] == one) b.push_back(i);}int m = sz(a);if (sz(b) != m) return INFL;ll res = 0;// 1 同士の swap をしても無駄なので,追い越しはせず 1 を順に対応させていくのが最善rep(j, m) res += abs(a[j] - b[j]);return res;}pil naive(int n, vi a) {int x = n / 2;string s;rep(i, n) s += '0' + (a[i] > x);ll y = INFL;if (n & 1) {string t;rep(i, n) t += '1' - i % 2;y = swap_distance(s, t);}else {for (int m = 0; m <= n; m += 2) {string t;rep(i, n) t += '1' - ((i % 2) ^ (i >= m));dump(t);chmin(y, swap_distance(s, t));}}return make_pair(x, y);}pil WA(int n, vi a) {int x = n / 2;string s;rep(i, n) s += '0' + (a[i] > x);string t;if (n & 1) {rep(i, n) t += '1' - i % 2;}else {if (s[0] == '0' && s[n - 1] == '1') {rep(i, n) t += '0' + i % 2;}else if (s[0] == '1' && s[n - 1] == '0') {rep(i, n) t += '1' - i % 2;}else {bool fast = false; int ib = -1;int m = x / 2 * 2; // evenrep(i, n) {if (i & 1) {if (s[i] == '1' && (fast || s[n - 1 - i] == '0')) {if (fast) {if (ib & 1) m = n - 1 - ib;else m = n - ib;}else m = n - 1 - i;break;}if (s[n - 1 - i] == '1' && (fast || s[i] == '0')) {if (fast) {if (ib & 1) m = ib - 1;else m = ib;}else m = i - 1;break;}if (s[i] == '1' && s[n - 1 - i] == '1') {fast = true;ib = i;}}else {if (s[i] == '0' && (fast || s[n - 1 - i] == '1')) {if (fast) {if (ib & 1) m = n - 1 - ib;else m = n - ib;}else m = n - i;break;}if (s[n - 1 - i] == '0' && (fast || s[i] == '1')) {if (fast) {if (ib & 1) m = ib - 1;else m = ib;}else m = i;break;}if (s[i] == '0' && s[n - 1 - i] == '0') {fast = true;ib = i;}}}rep(i, n) t += '0' + (i % 2) ^ (i < m);}}dump(s); dump(t);ll y = swap_distance(s, t);return make_pair(x, y);}//【ランダム三分探索(下に凸)】O(log(r - l))/** 階差の符号変化が - → 0 → + である関数 f(x) の開区間 (l, r) における最小値を与える x を返す.* そうでなくても運が良ければ正しい x を返す.*/template <class T> ll random_ternary_search_lc(ll l, ll r, function<T(ll)>& f) {static bool first_call = true;mt19937 mt;uniform_int_distribution<ll> rnd;if (first_call) {first_call = false;mt.seed((int)time(NULL));rnd = uniform_int_distribution<ll>(0, INFL);}while (r - l > 2) {ll m1 = l + 1 + rnd(mt) % (r - l - 1);ll m2 = l + 1 + rnd(mt) % (r - l - 1);if (m1 > m2) swap(m1, m2);if (f(m1) > f(m2)) l = m1;else r = m2;}return l + 1;/* f の定義の雛形function<ll(ll)> f = [&](ll x) {return x;};*/}pil solve(int n, vi a) {auto start = chrono::system_clock::now();int x = n / 2;string s;rep(i, n) s += '0' + (a[i] > x);ll y = INFL;if (n & 1) {string t;rep(i, n) t += '1' - i % 2;y = swap_distance(s, t);}else {while (1) {function<ll(ll)> f = [&](ll hm) {string t;rep(i, n) t += '1' - ((i % 2) ^ (i >= hm * 2));return swap_distance(s, t);};ll hm = random_ternary_search_lc(-1LL, n / 2 + 1LL, f);string t;rep(i, n) t += '1' - ((i % 2) ^ (i >= hm * 2));if(chmin(y, swap_distance(s, t))) dump(y);auto now = chrono::system_clock::now();auto msec = chrono::duration_cast<std::chrono::milliseconds>(now - start).count();if (msec >= 1900) break;}}return make_pair(x, y);}void find_bug() {#ifdef _MSC_VER// 合わない入力例を見つける.mt19937_64 mt;mt.seed((int)time(NULL));uniform_int_distribution<ll> rnd(0LL, 1LL << 62);mute_dump = true;int n = 6;vi a(n);iota(all(a), 1);repp(a) {auto res_naive = naive(n, a);auto res_solve = solve(n, a);if (res_naive != res_solve) {cout << "----------error!----------" << endl;cout << "input:" << endl;cout << a << endl;cout << "results:" << endl;cout << res_naive << endl;cout << res_solve << endl;cout << "--------------------------" << endl;}}mute_dump = false;#endif}/*----------error!----------input:1 4 2 5 6 3results:(3,1)(3,3)--------------------------*/int main() {input_from_file("input.txt");// output_to_file("output.txt");// find_bug(); return 0;int n;cin >> n;vi a(n);cin >> a;dump(naive(n, a));int x; ll y;tie(x, y) = solve(n, a);cout << x << " " << y << endl;}