結果
問題 | No.919 You Are A Project Manager |
ユーザー |
|
提出日時 | 2019-10-25 22:26:23 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 1,650 ms / 3,000 ms |
コード長 | 3,014 bytes |
コンパイル時間 | 1,815 ms |
コンパイル使用メモリ | 107,488 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-27 17:13:09 |
合計ジャッジ時間 | 31,637 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 55 |
ソースコード
#include <algorithm> #include <bitset> #include <cassert> #include <cctype> #include <cmath> #include <cstdint> #include <cstdio> #include <cstring> #include <deque> #include <fstream> #include <functional> #include <iostream> #include <limits> #include <map> #include <numeric> #include <queue> #include <set> #include <vector> using namespace std; using ll = long long; #define fst first #define snd second /* clang-format off */ template <class T, size_t D> struct _vec { using type = vector<typename _vec<T, D - 1>::type>; }; template <class T> struct _vec<T, 0> { using type = T; }; template <class T, size_t D> using vec = typename _vec<T, D>::type; template <class T> vector<T> make_v(size_t size, const T& init) { return vector<T>(size, init); } template <class... Ts> auto make_v(size_t size, Ts... rest) { return vector<decltype(make_v(rest...))>(size, make_v(rest...)); } template <class T> inline void chmin(T &a, const T& b) { if (b < a) a = b; } template <class T> inline void chmax(T &a, const T& b) { if (b > a) a = b; } /* clang-format on */ const int B = 500; const ll INF = 1ll << 60; template <class T> vector<T> sumup(const vector<T>& a) { int N = a.size(); vector<T> res(N + 1); for (int i = 0; i < N; i++) res[i + 1] = res[i] + a[i]; return res; } int main() { #ifdef DEBUG ifstream ifs("in.txt"); cin.rdbuf(ifs.rdbuf()); #endif int N; while (cin >> N) { vector<int> A(N); for (int& x : A) cin >> x; vec<int, 2> bucket((N + B - 1) / B); vector<int> nums = A; for (int i = 0; i < N; i++) { bucket[i / B].push_back(A[i]); } sort(nums.begin(), nums.end()); for (int i = 0; i < N / B; i++) sort(bucket[i].begin(), bucket[i].end()); auto query = [&](int l, int r, int k) { int lb = -1, ub = N - 1; while (ub - lb > 1) { int md = (lb + ub) / 2; int x = nums[md]; int tl = l, tr = r, c = 0; while (tl < tr && tl % B != 0) if (A[tl++] <= x) c++; while (tl < tr && tr % B != 0) if (A[--tr] <= x) c++; while (tl < tr) { int b = tl / B; c += upper_bound(bucket[b].begin(), bucket[b].end(), x) - bucket[b].begin(); tl += B; } if (c >= k) ub = md; else lb = md; } return nums[ub]; }; ll res = 0; for (int K = 1; K <= N; K++) { vector<ll> L(N / K), R(N / K); for (int l = 0, i = 0; l + K <= N; l += K, i++) L[i] = query(l, l + K, (K + 1) / 2); for (int r = N, i = 0; r - K >= 0; r -= K, i++) R[i] = query(r - K, r, (K + 1) / 2); auto sumL = sumup(L); auto sumR = sumup(R); auto maxL = sumL; for (int i = 1; i < maxL.size(); i++) maxL[i] = max(maxL[i - 1], maxL[i]); auto maxR = sumR; for (int i = 1; i < maxR.size(); i++) maxR[i] = max(maxR[i - 1], maxR[i]); for (int l = 0; l <= N / K; l++) { chmax(res, K * (maxL[l] + maxR[N / K - l])); } } cout << res << endl; } return 0; }