結果
問題 | No.2173 Nightcord |
ユーザー | 👑 Nachia |
提出日時 | 2022-12-25 01:07:27 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 675 ms / 2,525 ms |
コード長 | 4,602 bytes |
コンパイル時間 | 1,575 ms |
コンパイル使用メモリ | 97,220 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-04-28 19:25:26 |
合計ジャッジ時間 | 15,569 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 488 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 3 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 3 ms
5,376 KB |
testcase_09 | AC | 340 ms
5,376 KB |
testcase_10 | AC | 170 ms
5,376 KB |
testcase_11 | AC | 14 ms
5,376 KB |
testcase_12 | AC | 308 ms
5,376 KB |
testcase_13 | AC | 25 ms
5,376 KB |
testcase_14 | AC | 352 ms
5,376 KB |
testcase_15 | AC | 398 ms
5,376 KB |
testcase_16 | AC | 5 ms
5,376 KB |
testcase_17 | AC | 52 ms
5,376 KB |
testcase_18 | AC | 201 ms
5,376 KB |
testcase_19 | AC | 4 ms
5,376 KB |
testcase_20 | AC | 194 ms
5,376 KB |
testcase_21 | AC | 282 ms
5,376 KB |
testcase_22 | AC | 317 ms
5,376 KB |
testcase_23 | AC | 296 ms
5,376 KB |
testcase_24 | AC | 642 ms
5,376 KB |
testcase_25 | AC | 405 ms
5,376 KB |
testcase_26 | AC | 521 ms
5,376 KB |
testcase_27 | AC | 5 ms
5,376 KB |
testcase_28 | AC | 464 ms
5,376 KB |
testcase_29 | AC | 65 ms
5,376 KB |
testcase_30 | AC | 675 ms
5,376 KB |
testcase_31 | AC | 108 ms
5,376 KB |
testcase_32 | AC | 297 ms
5,376 KB |
testcase_33 | AC | 572 ms
5,376 KB |
testcase_34 | AC | 622 ms
5,376 KB |
testcase_35 | AC | 286 ms
5,376 KB |
testcase_36 | AC | 350 ms
5,376 KB |
testcase_37 | AC | 536 ms
5,376 KB |
testcase_38 | AC | 90 ms
5,376 KB |
testcase_39 | AC | 290 ms
5,376 KB |
testcase_40 | AC | 602 ms
5,376 KB |
testcase_41 | AC | 362 ms
5,376 KB |
testcase_42 | AC | 294 ms
5,376 KB |
testcase_43 | AC | 30 ms
5,376 KB |
testcase_44 | AC | 2 ms
5,376 KB |
testcase_45 | AC | 98 ms
5,376 KB |
testcase_46 | AC | 171 ms
5,376 KB |
testcase_47 | AC | 140 ms
5,376 KB |
testcase_48 | AC | 68 ms
5,376 KB |
testcase_49 | AC | 4 ms
5,376 KB |
testcase_50 | AC | 26 ms
5,376 KB |
testcase_51 | AC | 154 ms
5,376 KB |
testcase_52 | AC | 4 ms
5,376 KB |
testcase_53 | AC | 166 ms
5,376 KB |
testcase_54 | AC | 247 ms
5,376 KB |
testcase_55 | AC | 48 ms
5,376 KB |
testcase_56 | AC | 101 ms
5,376 KB |
ソースコード
#include <iostream> #include <string> #include <vector> #include <algorithm> #include <utility> #include <atcoder/modint> namespace nachia{ template<class Elem, class InternalElem = Elem> std::vector<int> convexHull(std::vector<std::pair<Elem, Elem>> points) { int n = points.size(); std::vector<int> ord(n); for(int i=0; i<n; i++) ord[i] = i; std::sort(ord.begin(), ord.end(), [&](int l, int r) -> bool { return points[l] < points[r]; }); std::vector<int> res; int ressz = 0; for(int t=0; t<2; t++){ for(int p : ord){ InternalElem x0 = points[p].first, y0 = points[p].second; while(ressz + 2 <= (int)res.size()){ int q = res.back(); InternalElem x1 = points[q].first - x0, y1 = points[q].second - y0; res.pop_back(); InternalElem x2 = points[res.back()].first - x0, y2 = points[res.back()].second - y0; if(x1 * y2 - x2 * y1 > 0) continue; res.push_back(q); break; } res.push_back(p); } if(t == 0) std::reverse(ord.begin(), ord.end()); res.pop_back(); ressz = res.size(); } return res; } } // namespace nachia using namespace std; using i32 = int32_t; using u32 = uint32_t; using i64 = int64_t; using u64 = uint64_t; #define rep(i,n) for(int i=0; i<(int)(n); i++) const i64 INF = 1001001001001001001; using Modint = atcoder::static_modint<998244353>; struct Vec2 { i64 x; i64 y; Vec2 neg() const { return {-x,-y}; } }; Vec2 operator-(Vec2 l, Vec2 r){ return {l.x-r.x,l.y-r.y}; } i64 cross(Vec2 o, Vec2 lh){ return o.x*lh.y-o.y*lh.x; } i64 dot(Vec2 o, Vec2 lh){ return o.x*lh.x+o.y*lh.y; } std::vector<int> sort_points_by_argument(const std::vector<Vec2>& points) { std::vector<int> case_split[9]; for (int i = 0; i < (int)points.size(); i++) { int case_id = 0; if (points[i].x == 0) case_id += 1; if (points[i].x > 0) case_id += 2; if (points[i].y == 0) case_id += 3; if (points[i].y > 0) case_id += 6; case_split[case_id].push_back(i); } auto sort_by_argument_small = [&points](int l, int r)->bool { return points[l].x * points[r].y - points[l].y * points[r].x > 0; }; for (int t = 0; t < 9; t++) { std::sort(case_split[t].begin(), case_split[t].end(), sort_by_argument_small); } std::vector<int> res; res.reserve(points.size()); for (int case_id : { 0, 1, 2, 4, 5, 8, 7, 6, 3 }) { std::copy(case_split[case_id].begin(), case_split[case_id].end(), std::back_inserter(res)); } return res; } vector<Vec2> convexHull(vector<Vec2> A){ if(A.size() == 1) return A; vector<pair<i64, i64>> P(A.size()); rep(i,A.size()) P[i] = {A[i].x,A[i].y}; auto q = nachia::convexHull(std::move(P)); vector<Vec2> ans; for(int i : q) ans.push_back(A[i]); return ans; } bool AupThanB(Vec2 a, Vec2 b1, Vec2 b2){ if(b1.x > b2.x) swap(b1, b2); if(a.x < b1.x || b2.x < a.x) return true; if(b1.x == b2.x) return a.y > max(b1.y, b2.y); return cross(b2-b1, a-b1) > 0; } bool BupThanA(Vec2 a, Vec2 b1, Vec2 b2){ return AupThanB(a.neg(), b1.neg(), b2.neg()); } bool solve1(vector<Vec2> A, vector<Vec2> B){ A = convexHull(A); B = convexHull(B); A.push_back(A.front()); B.push_back(B.front()); rep(i,A.size()) rep(j,B.size()-1) if(!AupThanB(A[i],B[j],B[j+1])) return false; rep(i,A.size()-1) rep(j,B.size()) if(!BupThanA(B[j],A[i],A[i+1])) return false; return true; } bool solve2(vector<Vec2> A, vector<Vec2> B){ for(Vec2 a : A){ vector<Vec2> Bp(B.size()*2); rep(i,B.size()){ Bp[i*2+0] = a - B[i]; Bp[i*2+1] = B[i] - a; } auto I = sort_points_by_argument(Bp); rep(i,I.size()-1) if(I[i]%2 != I[i+1]%2) if(cross(Bp[I[i]], Bp[I[i+1]]) == 0) if(dot(Bp[I[i]], Bp[I[i+1]]) > 0) return true; } return false; } int main(){ int N; cin >> N; int K; cin >> K; vector<Vec2> a, b; rep(i,N){ int x,y,c; cin >> x >> y >> c; if(c == 1) a.push_back({x,y}); if(c == 2) b.push_back({x,y}); } if(a.empty() || b.empty()){ cout << "No\n"; return 0; } bool ansa = solve2(a, b) || solve2(b, a); bool ansx = (K>=4) && !(solve1(a, b) || solve1(b, a)); if(ansa || ansx) cout << "Yes\n"; else cout << "No\n"; return 0; } struct ios_do_not_sync{ ios_do_not_sync(){ ios::sync_with_stdio(false); cin.tie(nullptr); } } ios_do_not_sync_instance;