結果
問題 | No.2012 Largest Triangle |
ユーザー | srtubaki |
提出日時 | 2022-07-15 23:00:40 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,777 bytes |
コンパイル時間 | 2,536 ms |
コンパイル使用メモリ | 210,640 KB |
実行使用メモリ | 12,800 KB |
最終ジャッジ日時 | 2024-06-27 20:09:52 |
合計ジャッジ時間 | 11,221 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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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 | 2 ms
5,376 KB |
testcase_04 | WA | - |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | WA | - |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | AC | 2 ms
5,376 KB |
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 | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | AC | 3 ms
5,376 KB |
testcase_37 | AC | 3 ms
5,376 KB |
testcase_38 | AC | 3 ms
5,376 KB |
testcase_39 | AC | 3 ms
5,376 KB |
testcase_40 | AC | 3 ms
5,376 KB |
testcase_41 | AC | 70 ms
5,864 KB |
ソースコード
#pragma region template #include <bits/stdc++.h> using namespace std; // clang-format off using ll = long long; using vl = vector<ll>; using vvl = vector<vl>; using ld = long double; using vld = vector<ld>; using vvld = vector<vld>; using pll = pair<ll, ll>; using vpll = vector<pll>; using vvpll = vector<vpll>; using vb = vector<bool>; using vvb = vector<vector<bool>>; using vs = vector<string>; using mll = map<ll, ll>; template <class T> using V = vector<T>; template <class T> using VV = V<V<T>>; template <class T> using VVV = V<VV<T>>; template <class T> using max_heap = priority_queue<T>; template <class T> using min_heap = priority_queue<T, vector<T>, greater<T>>; constexpr ll inf = 3001001000100100100LL; #define endl '\n' #define _overload(_1, _2, _3, name, ...) name #define rep(...) _overload(__VA_ARGS__, _rep, _rep2,)(__VA_ARGS__) #define repc(...) _overload(__VA_ARGS__, _repc, _repc2,)(__VA_ARGS__) #define repr(...) _overload(__VA_ARGS__, _repr, _repr2,)(__VA_ARGS__) #define reprc(...) _overload(__VA_ARGS__, _reprc, _reprc2,)(__VA_ARGS__) #define _rep(i,k,n) for(ll i=(k) , i##_xxxx=(n); i < i##_xxxx; ++i) #define _repc(i,k,n) for(ll i=(k) , i##_xxxx=(n); i <=i##_xxxx; ++i) #define _repr(i,k,n) for(ll i=(n)-1, i##_xxxx=(k); i >=i##_xxxx; --i) #define _reprc(i,k,n) for(ll i=(n) , i##_xxxx=(k); i >=i##_xxxx; --i) #define _rep2(i,n) _rep(i,0,n) #define _repc2(i,n) _repc(i,1,n) #define _repr2(i,n) _repr(i,0,n) #define _reprc2(i,n) _reprc(i,1,n) #define rall(o) rbegin(o), rend(o) #define all(o) begin(o), end(o) template <class C> ll sz(const C& c) { return static_cast<ll>(c.size()); } template <class T> bool chmax(T& m, const T& v){ if (m < v){ m = v; return true; } return false; } template <class T> bool chmin(T& m, const T& v){ if (v < m){ m = v; return true; } return false; } template <class T> T cdiv(const T& a, const T& b){ return (a + b - 1) / b; } template <class T> T rdiv(const T& a, const T& b){ return (a + b / 2) / b; } template <class T, class S> string join(const T& v, const S& sep ){ stringstream ss; bool f = false; for (const auto& e : v){ if (f) ss << sep; f = true; ss << e;} return ss.str(); } template <class T, class S, class... U> string join(const T& v, const S& sep, const U& ...args){ stringstream ss; bool f = false; for (const auto& c : v){ if (f) ss << sep; f = true; ss << join(c, args...); } return ss.str(); } template <class T> ostream& operator<<(ostream& os, const vector<T>& seq){ os << '[' << join(seq, ",") << ']'; return os; } template <class T> ostream& operator<<(ostream& os, const vector<vector<T>>& seq){ os << '[' << join(seq, ",\n ") << ']'; return os; } template <class T> ostream& operator<<(ostream& os, const deque<T>& seq){ os << '[' << join(seq, ",") << ']'; return os; } template <class T> ostream& operator<<(ostream& os, const set<T>& seq){ os << '{' << join(seq, ",") << '}'; return os; } template <class T , class TH> ostream& operator<<(ostream& os, const unordered_set<T, TH>& seq){ os << '{' << join(seq, ",") << '}'; return os; } template <class TK, class TV> ostream& operator<<(ostream& os, const map<TK, TV>& seq){ os << '{'; bool f = false; for (const auto& e : seq){ if (f) os << ','; f = true; os << e.first << ":" << e.second; } os << '}'; return os; } template <class T1, class T2> ostream& operator<<(ostream& os, const pair<T1, T2>& pa){ os << '(' << pa.first << ',' << pa.second << ')'; return os; } #if LOCAL #define debug(...) _debug(__VA_ARGS__, __LINE__) #else #define debug(...) #endif void print() { std::cout << '\n'; } template <class S> void print(const S& a){ std::cout << a << '\n'; } template <class S> void _debug(const S& a){ std::cerr << "(L:" << std::setw(3) << a << ")\n"; } template <class S, class... T> void print(const S& a, const T&... args){ std::cout << a << ' '; print(args...); } template <class S, class... T> void _debug(const S& a, const T&... args){ std::cerr << a << ' '; _debug(args...); } struct setup_main { setup_main() { std::cin.tie(nullptr); std::ios::sync_with_stdio(false); std::cout << fixed << setprecision(15); } } setup_main_; // clang-format on #pragma endregion struct Point { ll x, y; bool operator<(const Point& b) const { return x < b.x or (x == b.x and y < b.y); } ll operator*(const Point& b) const { return abs(x * b.y - b.x * y); } }; ostream& operator<<(ostream& os, const Point& p) { os << pair{p.x, p.y}; return os; } /*/ 凸包上の点だけ考えれば良い 底辺を決め打って、高さを3分探索 倍加すると探索が楽 /*/ void solve(int N, vector<ll>& X, vector<ll>& Y) { rep(i, N) X[i] = abs(X[i]); vector<Point> P(N); rep(i, N) P[i] = {X[i], Y[i]}; sort(all(P)); debug(P); rep(i, N) { P.push_back(Point{-X[i], -Y[i]}); } debug(P); rep(i, N) rep(j, N) debug(i, j, P[i] * P[j]); ll ans = 0; rep(i, N) { Point p = P[i]; ll l = i, r = i + N; rep(_, 100) { // while (r - l > 2) { ll ml = l + (r - l) / 3, mr = r - (r - l) / 3; debug(l, ml, mr, r); if (p * P[ml] < p * P[mr]) l = ml; else r = mr; assert(r > l); } assert(r - l <= 2); debug(p, r, p * P[l], p * P[(r + l) / 2], p * P[r]); chmax(ans, p * P[l]); chmax(ans, p * P[(r + l) / 2]); chmax(ans, p * P[r]); } print(ans); } int main() { int N; cin >> N; vector<ll> x(N), y(N); rep(i, N) { cin >> x[i] >> y[i]; } solve(N, x, y); }