結果
問題 | No.1804 Intersection of LIS |
ユーザー | fuppy_kyopro |
提出日時 | 2022-01-07 22:16:19 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 600 ms / 2,000 ms |
コード長 | 7,731 bytes |
コンパイル時間 | 2,689 ms |
コンパイル使用メモリ | 222,420 KB |
実行使用メモリ | 25,072 KB |
最終ジャッジ日時 | 2024-11-14 08:50:24 |
合計ジャッジ時間 | 14,443 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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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 | 1 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,820 KB |
testcase_03 | AC | 600 ms
20,924 KB |
testcase_04 | AC | 595 ms
20,896 KB |
testcase_05 | AC | 582 ms
20,816 KB |
testcase_06 | AC | 577 ms
20,976 KB |
testcase_07 | AC | 591 ms
20,792 KB |
testcase_08 | AC | 582 ms
20,844 KB |
testcase_09 | AC | 586 ms
20,784 KB |
testcase_10 | AC | 581 ms
20,856 KB |
testcase_11 | AC | 584 ms
20,804 KB |
testcase_12 | AC | 575 ms
20,872 KB |
testcase_13 | AC | 581 ms
20,848 KB |
testcase_14 | AC | 586 ms
20,828 KB |
testcase_15 | AC | 584 ms
20,888 KB |
testcase_16 | AC | 581 ms
20,836 KB |
testcase_17 | AC | 584 ms
20,892 KB |
testcase_18 | AC | 5 ms
6,816 KB |
testcase_19 | AC | 5 ms
6,820 KB |
testcase_20 | AC | 5 ms
6,816 KB |
testcase_21 | AC | 5 ms
6,820 KB |
testcase_22 | AC | 5 ms
6,816 KB |
testcase_23 | AC | 6 ms
6,816 KB |
testcase_24 | AC | 6 ms
6,820 KB |
testcase_25 | AC | 6 ms
6,816 KB |
testcase_26 | AC | 6 ms
6,816 KB |
testcase_27 | AC | 5 ms
6,816 KB |
testcase_28 | AC | 2 ms
6,820 KB |
testcase_29 | AC | 2 ms
6,816 KB |
testcase_30 | AC | 2 ms
6,816 KB |
testcase_31 | AC | 2 ms
6,820 KB |
testcase_32 | AC | 2 ms
6,816 KB |
testcase_33 | AC | 2 ms
6,820 KB |
testcase_34 | AC | 2 ms
6,816 KB |
testcase_35 | AC | 383 ms
25,060 KB |
testcase_36 | AC | 381 ms
25,072 KB |
testcase_37 | AC | 252 ms
20,764 KB |
testcase_38 | AC | 254 ms
20,780 KB |
testcase_39 | AC | 2 ms
6,820 KB |
コンパイルメッセージ
main.cpp: In function 'std::vector<int> lis(std::vector<int>)': main.cpp:225:18: warning: 'start' may be used uninitialized [-Wmaybe-uninitialized] 225 | while (start != -1) { | ~~~~~~^~~~~ main.cpp:215:9: note: 'start' declared here 215 | int start; | ^~~~~ main.cpp:225:18: warning: 'start' may be used uninitialized [-Wmaybe-uninitialized] 225 | while (start != -1) { | ~~~~~~^~~~~ main.cpp:215:9: note: 'start' declared here 215 | int start; | ^~~~~
ソースコード
/* #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") //*/ #include <bits/stdc++.h> // #include <atcoder/all> // #include <atcoder/maxflow> using namespace std; // using namespace atcoder; #define DEBUG(x) cerr << #x << ": " << x << endl; #define DEBUG_VEC(v) \ cerr << #v << ":"; \ for (int iiiiiiii = 0; iiiiiiii < v.size(); iiiiiiii++) \ cerr << " " << v[iiiiiiii]; \ cerr << endl; #define DEBUG_MAT(v) \ cerr << #v << endl; \ for (int iv = 0; iv < v.size(); iv++) { \ for (int jv = 0; jv < v[iv].size(); jv++) { \ cerr << v[iv][jv] << " "; \ } \ cerr << endl; \ } typedef long long ll; // #define int ll #define vi vector<int> #define vl vector<ll> #define vii vector<vector<int>> #define vll vector<vector<ll>> #define vs vector<string> #define pii pair<int, int> #define pis pair<int, string> #define psi pair<string, int> #define pll pair<ll, ll> template <class S, class T> pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first + t.first, s.second + t.second); } template <class S, class T> pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first - t.first, s.second - t.second); } template <class S, class T> ostream &operator<<(ostream &os, pair<S, T> p) { os << "(" << p.first << ", " << p.second << ")"; return os; } #define X first #define Y second #define rep(i, n) for (int i = 0; i < (int)(n); i++) #define rep1(i, n) for (int i = 1; i <= (int)(n); i++) #define rrep(i, n) for (int i = (int)(n)-1; i >= 0; i--) #define rrep1(i, n) for (int i = (int)(n); i > 0; i--) #define REP(i, a, b) for (int i = a; i < b; i++) #define in(x, a, b) (a <= x && x < b) #define all(c) c.begin(), c.end() void YES(bool t = true) { cout << (t ? "YES" : "NO") << endl; } void Yes(bool t = true) { cout << (t ? "Yes" : "No") << endl; } void yes(bool t = true) { cout << (t ? "yes" : "no") << endl; } void NO(bool t = true) { cout << (t ? "NO" : "YES") << endl; } void No(bool t = true) { cout << (t ? "No" : "Yes") << endl; } void no(bool t = true) { cout << (t ? "no" : "yes") << endl; } 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 (a > b) { a = b; return 1; } return 0; } #define UNIQUE(v) v.erase(std::unique(v.begin(), v.end()), v.end()); const ll inf = 1000000001; const ll INF = (ll)1e18 + 1; const long double pi = 3.1415926535897932384626433832795028841971L; int popcount(ll t) { return __builtin_popcountll(t); } // int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1}; // int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 }; vi dx = {0, 1, 0, -1}, dy = {-1, 0, 1, 0}; vi dx2 = {1, 1, 0, -1, -1, -1, 0, 1}, dy2 = {0, 1, 1, 1, 0, -1, -1, -1}; struct Setup_io { Setup_io() { ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0); cout << fixed << setprecision(25); } } setup_io; const ll MOD = 1000000007; // const ll MOD = 998244353; // #define mp make_pair //#define endl '\n' template <typename T> class SegmentTree { public: using F = function<T(T &, T &)>; int n; vector<T> dat; T e; // �P�ʌ� F query_func; F update_func; SegmentTree(vector<T> a, F query_func, F update_func, T e) : n(a.size()), query_func(query_func), update_func(update_func), e(e) { if (n == 0) { a.push_back(e); n++; } dat.resize(4 * n); init(0, 0, n, a); } void init(int k, int l, int r, vector<T> &a) { if (r - l == 1) { dat[k] = a[l]; } else { int lch = 2 * k + 1, rch = 2 * k + 2; init(lch, l, (l + r) / 2, a); init(rch, (l + r) / 2, r, a); dat[k] = query_func(dat[lch], dat[rch]); } } //k�Ԗڂ̒l��a�ɕύX void update(int k, T a, int v, int l, int r) { if (r - l == 1) { dat[v] = update_func(dat[v], a); } else { if (k < (l + r) / 2) update(k, a, 2 * v + 1, l, (l + r) / 2); else { update(k, a, 2 * v + 2, (l + r) / 2, r); } dat[v] = query_func(dat[v * 2 + 1], dat[v * 2 + 2]); } } //[a,b)�̍ŏ��l�����߂� //���̂ق��̈����͌v�Z�̊ȒP�̂��߂̈��� //k�͐ړ_�̔ԍ�,l,r�͂��̐ړ_��[l,r)�ɑΉ����Ă��邱�Ƃ�\�� //�]���āA�O�����query(a,b,0,0,n)�Ƃ��Ă�� T query(int a, int b, int k, int l, int r) { if (r <= a || b <= l) { return e; } if (a <= l && r <= b) { return dat[k]; } else { T ul = query(a, b, k * 2 + 1, l, (l + r) / 2); T ur = query(a, b, k * 2 + 2, (l + r) / 2, r); return query_func(ul, ur); } } T query(int a, int b) { return query(a, b, 0, 0, n); } // ���������ĉE��T�� int find(int a, int b, int k, int l, int r, int x) { // ������ if (dat[k] < x || r <= a || b <= l) return -1; if (l + 1 == r) { // ������ if (dat[k] >= x) return l; else return -1; } int rv = find(a, b, 2 * k + 2, (l + r) / 2, r, x); if (rv != -1) return rv; return find(a, b, 2 * k + 1, l, (l + r) / 2, x); } }; pii f(pii a, pii b) { if (a.first != b.first) return max(a, b); else return min(a, b); } pii g(pii a, pii b) { return b; } vi lis(vi p) { int n = p.size(); vector<pii> ini(n + 1, pii(-inf, -inf)); ini[0] = pii(0, -1); SegmentTree<pii> seg(ini, f, g, pii(-inf, -inf)); vi pre(n); rep(i, n) { int x = p[i]; pii ma = seg.query(0, x, 0, 0, seg.n); pre[i] = ma.second; ma.first++; ma.second = i; seg.update(x, ma, 0, 0, seg.n); } int ans = seg.query(0, n + 1).first; int start; rep(i, n) { int x = p[i]; if (seg.query(x, x + 1).first == ans) { start = i; break; } } vi res; while (start != -1) { res.push_back(start); start = pre[start]; } // DEBUG_VEC(res); return res; } signed main() { int n; cin >> n; vi p(n); rep(i, n) { cin >> p[i]; } vi head = lis(p); vi q(n); rep(i, n) { q[i] = p[n - 1 - i]; q[i] = n + 1 - q[i]; } vi tail = lis(q); // assert(seg1.query(0, n + 1, 0, 0, seg1.n) == seg2.query(0, n + 1, 0, 0, seg2.n)); // int ma = seg1.query(0, n + 1, 0, 0, seg1.n); // vi s1o(n + 1), s2o(n + 1); // rep(i, n) { // s1o[p[i]] = seg1.query(i, i + 1); // s2o[q[i]] = seg1.query(i, i + 1); // } assert(head.size() == tail.size()); vi cnt(n); rep(i, head.size()) { cnt[head[i]]++; tail[i] = n - 1 - tail[i]; cnt[tail[i]]++; } int ans = 0; rep(i, n) { if (cnt[i] == 2) { ans++; } } cout << ans << endl; rep(i, n) { if (cnt[i] == 2) { cout << p[i] << " "; } } cout << endl; }