結果
問題 | No.1117 数列分割 |
ユーザー | keijak |
提出日時 | 2020-08-07 06:57:18 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 2,179 ms / 3,000 ms |
コード長 | 2,999 bytes |
コンパイル時間 | 2,138 ms |
コンパイル使用メモリ | 208,368 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-22 14:15:30 |
合計ジャッジ時間 | 22,473 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
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 | 2 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 78 ms
6,944 KB |
testcase_04 | AC | 124 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,944 KB |
testcase_06 | AC | 3 ms
6,940 KB |
testcase_07 | AC | 3 ms
6,940 KB |
testcase_08 | AC | 119 ms
6,944 KB |
testcase_09 | AC | 27 ms
6,944 KB |
testcase_10 | AC | 129 ms
6,940 KB |
testcase_11 | AC | 571 ms
6,940 KB |
testcase_12 | AC | 558 ms
6,940 KB |
testcase_13 | AC | 837 ms
6,940 KB |
testcase_14 | AC | 916 ms
6,944 KB |
testcase_15 | AC | 774 ms
6,940 KB |
testcase_16 | AC | 1,220 ms
6,944 KB |
testcase_17 | AC | 126 ms
6,944 KB |
testcase_18 | AC | 851 ms
6,940 KB |
testcase_19 | AC | 1,002 ms
6,940 KB |
testcase_20 | AC | 1,060 ms
6,944 KB |
testcase_21 | AC | 2,179 ms
6,944 KB |
testcase_22 | AC | 2,146 ms
6,944 KB |
testcase_23 | AC | 2,143 ms
6,944 KB |
testcase_24 | AC | 2,106 ms
6,940 KB |
testcase_25 | AC | 2,120 ms
6,940 KB |
testcase_26 | AC | 2 ms
6,944 KB |
testcase_27 | AC | 40 ms
6,944 KB |
testcase_28 | AC | 39 ms
6,940 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using i64 = long long; using u64 = unsigned long long; template <typename T> using V = vector<T>; #define REP(i, n) for (int i = 0; (i64)(i) < (i64)(n); ++i) #ifdef ENABLE_DEBUG template <typename T> void debug(T value) { cerr << value; } template <typename T, typename... Ts> void debug(T value, Ts... args) { cerr << value << ", "; debug(args...); } #define DEBUG(...) \ do { \ cerr << " \033[33m (L" << __LINE__ << ") "; \ cerr << #__VA_ARGS__ << ":\033[0m "; \ debug(__VA_ARGS__); \ cerr << endl; \ } while (0) #else #define debug(...) #define DEBUG(...) #endif #define chmax(x, y) x = max(x, y) const i64 INF = 1LL << 40; template <class Monoid> struct SegTree { using Func = function<Monoid(Monoid, Monoid)>; const Func F; const Monoid UNITY; int size; vector<Monoid> dat; SegTree(int n, const Func f, const Monoid &unity) : F(f), UNITY(unity), size(n), dat(2 * n, unity) {} // Sets i-th value (0-indexed) to x for initial setup. // build() must be called after set() calls. void set(int i, const Monoid &x) { dat[size + i] = x; } void build() { for (int k = size - 1; k > 0; --k) { dat[k] = F(dat[k * 2], dat[k * 2 + 1]); } } // Sets i-th value (0-indexed) to x. void update(int i, const Monoid &x) { int k = size + i; dat[k] = x; while (k > 1) { k >>= 1; dat[k] = F(dat[k * 2], dat[k * 2 + 1]); } } // Queries by [l,r) range (0-indexed, open interval). Monoid fold(int l, int r) { l += size; r += size; Monoid vleft = UNITY, vright = UNITY; for (; l < r; l >>= 1, r >>= 1) { if (l & 1) vleft = F(vleft, dat[l++]); if (r & 1) vright = F(dat[--r], vright); } return F(vleft, vright); } // Queries by a single index (0-indexed). Monoid operator[](int i) { return dat[size + i]; } /* debug */ void print() { for (int i = 0; i < size; ++i) { cout << (*this)[i]; if (i != size - 1) cout << ","; } cout << endl; } }; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); i64 N, K, M; cin >> N >> K >> M; V<i64> A(N); for (auto &x : A) cin >> x; V<i64> acum(N + 1); REP(i, N) { acum[i + 1] = acum[i] + A[i]; } V<i64> dp(N + 1, -INF); dp[0] = 0; auto mx = [](i64 x, i64 y) { return max(x, y); }; SegTree<i64> st1(N + 1, mx, -INF), st2(N + 1, mx, -INF); st1.update(0, 0); st2.update(0, 0); for (int k = 1; k <= K; ++k) { V<i64> dp_next(N + 1, -INF); for (int i = 1; i <= N; ++i) { st1.update(i, dp[i] - acum[i]); st2.update(i, dp[i] + acum[i]); } for (int i = 1; i <= N; ++i) { int start = max<int>(i - M, 0); dp_next[i] = max(st1.fold(start, i) + acum[i], st2.fold(start, i) - acum[i]); } swap(dp_next, dp); } cout << dp[N] << endl; }