結果
問題 | No.1117 数列分割 |
ユーザー | keijak |
提出日時 | 2022-01-01 00:36:23 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,738 bytes |
コンパイル時間 | 2,664 ms |
コンパイル使用メモリ | 214,256 KB |
実行使用メモリ | 74,240 KB |
最終ジャッジ日時 | 2024-10-09 10:32:51 |
合計ジャッジ時間 | 14,514 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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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 | AC | 2 ms
6,820 KB |
testcase_06 | WA | - |
testcase_07 | WA | - |
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 | - |
ソースコード
#include <bits/stdc++.h> #define REP_(i, a_, b_, a, b, ...) for (int i = (a), END_##i = (b); i < END_##i; ++i) #define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__) #define ALL(x) std::begin(x), std::end(x) using Int = long long; using Uint = unsigned long long; using Real = long double; template<typename T, typename U> inline bool chmax(T &a, U b) { return a < b and ((a = std::move(b)), true); } template<typename T, typename U> inline bool chmin(T &a, U b) { return a > b and ((a = std::move(b)), true); } template<typename T> inline int ssize(const T &a) { return (int) a.size(); } struct Void {}; template<class T> inline std::ostream &print_one(const T &x, char endc) { if constexpr (std::is_same<T, Void>::value) { return std::cout; // print nothing } else if constexpr (std::is_same<T, bool>::value) { return std::cout << (x ? "Yes" : "No") << endc; } else { return std::cout << x << endc; } } template<class T> inline std::ostream &print(const T &x) { return print_one(x, '\n'); } template<typename T, typename... Ts> std::ostream &print(const T &head, Ts... tail) { return print_one(head, ' '), print(tail...); } inline std::ostream &print() { return std::cout << '\n'; } template<typename Container> std::ostream &print_seq(const Container &seq, const char *sep = " ", const char *ends = "\n", std::ostream &os = std::cout) { const auto itl = std::begin(seq), itr = std::end(seq); for (auto it = itl; it != itr; ++it) { if (it != itl) os << sep; os << *it; } return os << ends; } struct CastInput { template<typename T> operator T() const { T x; std::cin >> x; return x; } struct Sized { std::size_t n; template<typename T> operator T() const { T x(n); for (auto &e: x) std::cin >> e; return x; } }; Sized operator()(std::size_t n) const { return {n}; } } in; #ifdef MY_DEBUG #include "debug_dump.hpp" #include "backward.hpp" backward::SignalHandling kSignalHandling; #else #define DUMP(...) #define cerr if(false)cerr #endif using namespace std; template<class BetterOp> struct SparseTableRMQ { static_assert(std::is_invocable_r_v<bool, BetterOp, int, int>); int n_; // sequence size BetterOp better_than_; // checks if lhs is strictly better than rhs. std::vector<std::vector<int>> sparse_table_; SparseTableRMQ(int n, BetterOp better) : n_(n), better_than_(std::move(better)), sparse_table_(n == 0 ? 1 : (msb_log(n) + 1), std::vector<int>(n)) { for (int j = 0; j < n; ++j) { sparse_table_[0][j] = j; } for (int i = 0, height = int(sparse_table_.size()) - 1; i < height; ++i) { for (int j = 0; j < n; ++j) { sparse_table_[i + 1][j] = better_index(sparse_table_[i][j], sparse_table_[i][std::min(j + (1 << i), n - 1)]); } } } // Returns the index of the best value in [l, r) (half-open interval). inline int fold(int l, int r) const { assert(0 <= l and l < r); assert(1 <= r and r <= n_); const int k = msb_log(r - l); const int l2 = r - (1 << k); return better_index(sparse_table_[k][l], sparse_table_[k][l2]); } private: // Log base 2 of the most significant bit that is set to 1. static inline int msb_log(unsigned x) { return std::numeric_limits<unsigned>::digits - __builtin_clz(x) - 1; } inline int better_index(int i, int j) const { return better_than_(i, j) ? i : j; } }; const Int kBig = 1e16; auto solve() { int n = in, K = in, M = in; vector<Int> a = in(n); vector<Int> acc(n + 1); REP(i, n) acc[i + 1] = acc[i] + a[i]; vector<Int> acc_minus(n + 1); REP(i, n + 1) acc_minus[i] = -acc[i]; auto dp = vector(n + 1, vector(K + 1, -kBig)); dp[0][0] = 0; REP(k, 1, K + 1) { vector<Int> nv1(n + 1, -kBig), nv2(n + 1, -kBig); for (int l = 0; l <= n; ++l) { Int v = dp[l][k - 1]; if (v == -kBig) continue; nv1[l] = v - acc[l]; nv2[l] = v - acc_minus[l]; } SparseTableRMQ rmq1(n + 1, [&](int i, int j) { return nv1[i] > nv1[j]; }); SparseTableRMQ rmq2(n + 1, [&](int i, int j) { return nv2[i] > nv2[j]; }); REP(r, 1, n + 1) { if (Int v = rmq1.fold(max(r - M, 0), r); v != -kBig) { chmax(dp[r][k], v + acc[r]); } if (Int v = rmq2.fold(max(r - M, 0), r); v != -kBig) { chmax(dp[r][k], v + acc_minus[r]); } } } return dp[n][K]; } int main() { std::ios::sync_with_stdio(false), cin.tie(nullptr); cout << std::fixed << std::setprecision(18); const int T = 1;//in; REP(t, T) { auto ans = solve(); print(ans); } }