結果
問題 | No.5020 Averaging |
ユーザー | square1001 |
提出日時 | 2024-02-25 17:33:31 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 812 ms / 1,000 ms |
コード長 | 2,713 bytes |
コンパイル時間 | 2,562 ms |
コンパイル使用メモリ | 219,288 KB |
実行使用メモリ | 458,904 KB |
スコア | 86,102,336 |
最終ジャッジ日時 | 2024-02-25 17:34:22 |
合計ジャッジ時間 | 41,500 ms |
ジャッジサーバーID (参考情報) |
judge13 / judge12 |
純コード判定しない問題か言語 |
(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 | 812 ms
458,904 KB |
testcase_01 | AC | 670 ms
458,904 KB |
testcase_02 | AC | 699 ms
458,904 KB |
testcase_03 | AC | 665 ms
458,904 KB |
testcase_04 | AC | 698 ms
458,904 KB |
testcase_05 | AC | 689 ms
458,904 KB |
testcase_06 | AC | 672 ms
458,904 KB |
testcase_07 | AC | 682 ms
458,904 KB |
testcase_08 | AC | 687 ms
458,904 KB |
testcase_09 | AC | 697 ms
458,904 KB |
testcase_10 | AC | 668 ms
458,904 KB |
testcase_11 | AC | 688 ms
458,904 KB |
testcase_12 | AC | 671 ms
458,904 KB |
testcase_13 | AC | 712 ms
458,904 KB |
testcase_14 | AC | 672 ms
458,904 KB |
testcase_15 | AC | 700 ms
458,904 KB |
testcase_16 | AC | 677 ms
458,904 KB |
testcase_17 | AC | 666 ms
458,904 KB |
testcase_18 | AC | 712 ms
458,904 KB |
testcase_19 | AC | 688 ms
458,904 KB |
testcase_20 | AC | 678 ms
458,904 KB |
testcase_21 | AC | 714 ms
458,904 KB |
testcase_22 | AC | 683 ms
458,904 KB |
testcase_23 | AC | 717 ms
458,904 KB |
testcase_24 | AC | 652 ms
458,904 KB |
testcase_25 | AC | 697 ms
458,904 KB |
testcase_26 | AC | 690 ms
458,904 KB |
testcase_27 | AC | 701 ms
458,904 KB |
testcase_28 | AC | 646 ms
458,904 KB |
testcase_29 | AC | 688 ms
458,904 KB |
testcase_30 | AC | 676 ms
458,904 KB |
testcase_31 | AC | 673 ms
458,904 KB |
testcase_32 | AC | 709 ms
458,904 KB |
testcase_33 | AC | 686 ms
458,904 KB |
testcase_34 | AC | 691 ms
458,904 KB |
testcase_35 | AC | 673 ms
458,904 KB |
testcase_36 | AC | 706 ms
458,904 KB |
testcase_37 | AC | 712 ms
458,904 KB |
testcase_38 | AC | 624 ms
458,904 KB |
testcase_39 | AC | 679 ms
458,904 KB |
testcase_40 | AC | 754 ms
458,904 KB |
testcase_41 | AC | 721 ms
458,904 KB |
testcase_42 | AC | 731 ms
458,904 KB |
testcase_43 | AC | 687 ms
458,904 KB |
testcase_44 | AC | 697 ms
458,904 KB |
testcase_45 | AC | 716 ms
458,904 KB |
testcase_46 | AC | 679 ms
458,904 KB |
testcase_47 | AC | 692 ms
458,904 KB |
testcase_48 | AC | 695 ms
458,904 KB |
testcase_49 | AC | 723 ms
458,904 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; class state { public: double x, y; uint64_t bit; int pre; state() : x(0.0), y(0.0), bit(0), pre(-1) {} state(double x_, double y_, uint64_t bit_, int pre_) : x(x_), y(y_), bit(bit_), pre(pre_) {} double score() const { return max(abs(x), abs(y)); } bool operator<(const state& s) const { return score() < s.score(); } }; int main() { // step #1. input int N; cin >> N; vector<double> A(N), B(N); for (int i = 0; i < N; i++) { cin >> A[i] >> B[i]; A[i] -= 5.0e+17; B[i] -= 5.0e+17; } // step #2. beam search const int BEAMWIDTH = 16000; vector<vector<state> > beam(N); for (int i = 1; i < N; i++) { uint64_t bit = ((1ULL << N) - 1) ^ (1ULL << i); beam[0].push_back(state(A[i] * 0.5, B[i] * 0.5, bit, -1)); } sort(beam[0].begin(), beam[0].end()); if (int(beam[0].size()) > BEAMWIDTH) { beam[0].resize(BEAMWIDTH); } for (int level = 1; level <= N - 1; level++) { double mul = pow(0.5, min(level + 1, N - 1)); for (int i = 0; i < int(beam[level - 1].size()); i++) { state s = beam[level - 1][i]; uint64_t b = s.bit; while (b != 0) { int pos = __builtin_ctzll(b); b ^= 1ULL << pos; double x = s.x + A[pos] * mul; double y = s.y + B[pos] * mul; uint64_t bit = s.bit ^ (1ULL << pos); beam[level].push_back(state(x, y, bit, i)); } } if (int(beam[level].size()) > BEAMWIDTH) { nth_element(beam[level].begin(), beam[level].begin() + BEAMWIDTH, beam[level].end()); beam[level].resize(BEAMWIDTH); } cerr << "level = " << level << ": size = " << beam[level].size() << ", score = " << (*min_element(beam[level].begin(), beam[level].end())).score() << ", back = " << beam[level].back().score() << endl; } // step #3. construct depth vector<int> depth(N, -1); int idx = min_element(beam[N - 1].begin(), beam[N - 1].end()) - beam[N - 1].begin(); uint64_t prebit = beam[N - 1][idx].bit; for (int i = N - 1; i >= 0; i--) { uint64_t nxtbit = (i != 0 ? beam[i - 1][beam[i][idx].pre].bit : (1ULL << N) - 1); uint64_t bitdiff = prebit ^ nxtbit; depth[__builtin_ctzll(bitdiff)] = min(i + 1, N - 1); prebit = nxtbit; if (i != 0) { idx = beam[i][idx].pre; } } // step #4. construct answer vector<array<int, 2> > answer; vector<int> curdepth = depth; while (curdepth[0] != 0) { int p1 = max_element(curdepth.begin(), curdepth.end()) - curdepth.begin(); int p2 = max_element(curdepth.begin() + p1 + 1, curdepth.end()) - curdepth.begin(); answer.push_back({p1, p2}); curdepth[p1] -= 1; curdepth[p2] = -1; } // step #5. output cout << answer.size() << endl; for (array<int, 2> v : answer) { cout << v[0] + 1 << ' ' << v[1] + 1 << endl; } return 0; }