結果
問題 | No.2353 Guardian Dogs in Spring |
ユーザー | iiljj |
提出日時 | 2023-06-16 22:14:47 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 5 ms / 2,000 ms |
コード長 | 13,234 bytes |
コンパイル時間 | 1,606 ms |
コンパイル使用メモリ | 145,912 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-06-24 14:42:41 |
合計ジャッジ時間 | 7,255 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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
6,812 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 5 ms
6,940 KB |
testcase_06 | AC | 4 ms
6,940 KB |
testcase_07 | AC | 4 ms
6,940 KB |
testcase_08 | AC | 4 ms
6,944 KB |
testcase_09 | AC | 4 ms
6,940 KB |
testcase_10 | AC | 5 ms
6,940 KB |
testcase_11 | AC | 4 ms
6,944 KB |
testcase_12 | AC | 5 ms
6,944 KB |
testcase_13 | AC | 4 ms
6,940 KB |
testcase_14 | AC | 2 ms
6,940 KB |
testcase_15 | AC | 4 ms
6,944 KB |
testcase_16 | AC | 5 ms
6,944 KB |
testcase_17 | AC | 5 ms
6,944 KB |
testcase_18 | AC | 5 ms
6,940 KB |
testcase_19 | AC | 5 ms
6,944 KB |
testcase_20 | AC | 2 ms
6,940 KB |
testcase_21 | AC | 2 ms
6,940 KB |
testcase_22 | AC | 3 ms
6,944 KB |
testcase_23 | AC | 4 ms
6,940 KB |
testcase_24 | AC | 2 ms
6,944 KB |
testcase_25 | AC | 2 ms
6,940 KB |
testcase_26 | AC | 2 ms
6,940 KB |
testcase_27 | AC | 2 ms
6,944 KB |
testcase_28 | AC | 2 ms
6,944 KB |
testcase_29 | AC | 4 ms
6,940 KB |
testcase_30 | AC | 3 ms
6,940 KB |
testcase_31 | AC | 3 ms
6,944 KB |
testcase_32 | AC | 5 ms
6,944 KB |
testcase_33 | AC | 4 ms
6,944 KB |
testcase_34 | AC | 5 ms
6,940 KB |
testcase_35 | AC | 4 ms
6,940 KB |
testcase_36 | AC | 3 ms
6,944 KB |
testcase_37 | AC | 2 ms
6,940 KB |
testcase_38 | AC | 3 ms
6,944 KB |
testcase_39 | AC | 2 ms
6,944 KB |
testcase_40 | AC | 3 ms
6,944 KB |
testcase_41 | AC | 4 ms
6,940 KB |
ソースコード
/* #region Head */ // #include <bits/stdc++.h> #include <algorithm> #include <array> #include <bitset> #include <cassert> // assert.h #include <cmath> // math.h #include <cstring> #include <ctime> #include <deque> #include <fstream> #include <functional> #include <iomanip> #include <iostream> #include <list> #include <map> #include <memory> #include <numeric> #include <queue> #include <random> #include <set> #include <sstream> #include <stack> #include <string> #include <unordered_map> #include <unordered_set> #include <vector> using namespace std; using ll = long long; using ull = unsigned long long; using ld = long double; using pll = pair<ll, ll>; template <class T> using vc = vector<T>; template <class T> using vvc = vc<vc<T>>; using vll = vc<ll>; using vvll = vvc<ll>; using vld = vc<ld>; using vvld = vvc<ld>; using vs = vc<string>; using vvs = vvc<string>; template <class T, class U> using um = unordered_map<T, U>; template <class T> using pq = priority_queue<T>; template <class T> using pqa = priority_queue<T, vc<T>, greater<T>>; template <class T> using us = unordered_set<T>; #define TREP(T, i, m, n) for (T i = (m), i##_len = (T)(n); i < i##_len; ++(i)) #define TREPM(T, i, m, n) for (T i = (m), i##_max = (T)(n); i <= i##_max; ++(i)) #define TREPR(T, i, m, n) for (T i = (m), i##_min = (T)(n); i >= i##_min; --(i)) #define TREPD(T, i, m, n, d) for (T i = (m), i##_len = (T)(n); i < i##_len; i += (d)) #define TREPMD(T, i, m, n, d) for (T i = (m), i##_max = (T)(n); i <= i##_max; i += (d)) #define REP(i, m, n) for (ll i = (m), i##_len = (ll)(n); i < i##_len; ++(i)) #define REPM(i, m, n) for (ll i = (m), i##_max = (ll)(n); i <= i##_max; ++(i)) #define REPR(i, m, n) for (ll i = (m), i##_min = (ll)(n); i >= i##_min; --(i)) #define REPD(i, m, n, d) for (ll i = (m), i##_len = (ll)(n); i < i##_len; i += (d)) #define REPMD(i, m, n, d) for (ll i = (m), i##_max = (ll)(n); i <= i##_max; i += (d)) #define REPI(itr, ds) for (auto itr = ds.begin(); itr != ds.end(); itr++) #define REPIR(itr, ds) for (auto itr = ds.rbegin(); itr != ds.rend(); itr++) #define ALL(x) begin(x), end(x) #define SIZE(x) ((ll)(x).size()) #define ISIZE(x) ((int)(x).size()) #define PERM(c) \ sort(ALL(c)); \ for (bool c##p = 1; c##p; c##p = next_permutation(ALL(c))) #define UNIQ(v) v.erase(unique(ALL(v)), v.end()); #define CEIL(a, b) (((a) + (b)-1) / (b)) #define endl '\n' constexpr ll INF = 1'010'000'000'000'000'017LL; constexpr int IINF = 1'000'000'007LL; constexpr ll MOD = 1'000'000'007LL; // 1e9 + 7 // constexpr ll MOD = 998244353; constexpr ld EPS = 1e-12; constexpr ld PI = 3.14159265358979323846; template <typename T> istream &operator>>(istream &is, vc<T> &vec) { // vector 入力 for (T &x : vec) is >> x; return is; } template <typename T> ostream &operator<<(ostream &os, const vc<T> &vec) { // vector 出力 (for dump) os << "{"; REP(i, 0, SIZE(vec)) os << vec[i] << (i == i_len - 1 ? "" : ", "); os << "}"; return os; } template <typename T> ostream &operator>>(ostream &os, const vc<T> &vec) { // vector 出力 (inline) REP(i, 0, SIZE(vec)) os << vec[i] << (i == i_len - 1 ? "\n" : " "); return os; } template <typename T, size_t _Nm> istream &operator>>(istream &is, array<T, _Nm> &arr) { // array 入力 REP(i, 0, SIZE(arr)) is >> arr[i]; return is; } template <typename T, size_t _Nm> ostream &operator<<(ostream &os, const array<T, _Nm> &arr) { // array 出力 (for dump) os << "{"; REP(i, 0, SIZE(arr)) os << arr[i] << (i == i_len - 1 ? "" : ", "); os << "}"; return os; } template <typename T, typename U> istream &operator>>(istream &is, pair<T, U> &pair_var) { // pair 入力 is >> pair_var.first >> pair_var.second; return is; } template <typename T, typename U> ostream &operator<<(ostream &os, const pair<T, U> &pair_var) { // pair 出力 os << "(" << pair_var.first << ", " << pair_var.second << ")"; return os; } // map, um, set, us 出力 template <class T> ostream &out_iter(ostream &os, const T &map_var) { os << "{"; REPI(itr, map_var) { os << *itr; auto itrcp = itr; if (++itrcp != map_var.end()) os << ", "; } return os << "}"; } template <typename T, typename U> ostream &operator<<(ostream &os, const map<T, U> &map_var) { return out_iter(os, map_var); } template <typename T, typename U> ostream &operator<<(ostream &os, const um<T, U> &map_var) { os << "{"; REPI(itr, map_var) { auto [key, value] = *itr; os << "(" << key << ", " << value << ")"; auto itrcp = itr; if (++itrcp != map_var.end()) os << ", "; } os << "}"; return os; } template <typename T> ostream &operator<<(ostream &os, const set<T> &set_var) { return out_iter(os, set_var); } template <typename T> ostream &operator<<(ostream &os, const us<T> &set_var) { return out_iter(os, set_var); } template <typename T> ostream &operator<<(ostream &os, const pq<T> &pq_var) { pq<T> pq_cp(pq_var); os << "{"; if (!pq_cp.empty()) { os << pq_cp.top(), pq_cp.pop(); while (!pq_cp.empty()) os << ", " << pq_cp.top(), pq_cp.pop(); } return os << "}"; } // tuple 出力 template <size_t N = 0, bool end_line = false, typename... Args> ostream &operator<<(ostream &os, tuple<Args...> &a) { if constexpr (N < std::tuple_size_v<tuple<Args...>>) { os << get<N>(a); if constexpr (N + 1 < std::tuple_size_v<tuple<Args...>>) { os << ' '; } else if constexpr (end_line) { os << '\n'; } return operator<< <N + 1, end_line>(os, a); } return os; } template <typename... Args> void print_tuple(tuple<Args...> &a) { operator<< <0, true>(cout, a); } void pprint() { cout << endl; } template <class Head, class... Tail> void pprint(Head &&head, Tail &&...tail) { cout << head; if (sizeof...(Tail) > 0) cout << ' '; pprint(move(tail)...); } // dump #define DUMPOUT cerr void dump_func() { DUMPOUT << endl; } template <class Head, class... Tail> void dump_func(Head &&head, Tail &&...tail) { DUMPOUT << head; if (sizeof...(Tail) > 0) DUMPOUT << ", "; dump_func(move(tail)...); } // chmax (更新「される」かもしれない値が前) template <typename T, typename U, typename Comp = less<>> bool chmax(T &xmax, const U &x, Comp comp = {}) { if (comp(xmax, x)) { xmax = x; return true; } return false; } // chmin (更新「される」かもしれない値が前) template <typename T, typename U, typename Comp = less<>> bool chmin(T &xmin, const U &x, Comp comp = {}) { if (comp(x, xmin)) { xmin = x; return true; } return false; } // ローカル用 #ifndef ONLINE_JUDGE #define DEBUG_ #endif #ifndef MYLOCAL #undef DEBUG_ #endif #ifdef DEBUG_ #define DEB #define dump(...) \ DUMPOUT << " " << string(#__VA_ARGS__) << ": " \ << "[" << to_string(__LINE__) << ":" << __FUNCTION__ << "]" << endl \ << " ", \ dump_func(__VA_ARGS__) #else #define DEB if (false) #define dump(...) #endif #define VAR(type, ...) \ type __VA_ARGS__; \ assert((cin >> __VA_ARGS__)); template <typename T> istream &operator,(istream &is, T &rhs) { return is >> rhs; } template <typename T> ostream &operator,(ostream &os, const T &rhs) { return os << ' ' << rhs; } struct AtCoderInitialize { static constexpr int IOS_PREC = 15; static constexpr bool AUTOFLUSH = false; AtCoderInitialize() { ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr); cout << fixed << setprecision(IOS_PREC); if (AUTOFLUSH) cout << unitbuf; } } ATCODER_INITIALIZE; void Yn(bool p) { cout << (p ? "Yes" : "No") << endl; } void YN(bool p) { cout << (p ? "YES" : "NO") << endl; } template <typename T> constexpr void operator--(vc<T> &v, int) noexcept { for (int i = 0; i < ISIZE(v); ++i) v[i]--; } template <typename T> constexpr void operator++(vc<T> &v, int) noexcept { for (int i = 0; i < ISIZE(v); ++i) v[i]++; } /* #endregion */ // #include <atcoder/all> // using namespace atcoder; /* #region IntGeometry */ // template <typename T = ll> struct P { using T = ll; T x, y; ll idx; P() : x(0), y(0) {} P(const T x, const T y, const ll idx) : x(x), y(y), idx(idx) {} T real() const { return x; } T imag() const { return y; } P &operator+=(const P a) { x += a.x; y += a.y; return *this; } P &operator-=(const P a) { x -= a.x; y -= a.y; return *this; } P operator+(const P a) const { P res(*this); return res += a; } P operator-(const P a) const { P res(*this); return res -= a; } // norm の自乗を返す friend T norm(const P a) { return a.x * a.x + a.y * a.y; } // 外積(の大きさ)を求める friend T cross(const P &a, const P &b) { return a.real() * b.imag() - a.imag() * b.real(); } // 内積を求める friend T dot(const P &a, const P &b) { return a.real() * b.real() + a.imag() * b.imag(); } // 偏角を求める.ただし 0 の偏角は求められない. // [-π, π] の範囲で返す. ld arg() const { assert(x != 0 || y != 0); return atan2<ld, ld>(y, x); } // base 方向を基準にした a の方向(a/base の偏角)を求める. // [-π, π] の範囲で返す. friend ld arg(const P &a, const P &base) { ld ans = a.arg() - base.arg(); if (ans > PI) { ans -= PI * 2; } if (ans <= -PI) ans += PI * 2; return ans; } // 出力 friend ostream &operator<<(ostream &os, const P a) { os << '(' << a.x << ", " << a.y << ", " << a.idx << ')'; return os; } // 象限を返す(偏角ソート用) int area_id() const { if (y < 0) { if (x > 0) return 4; return 3; } if (x < 0) return 2; return 1; } friend bool operator<(const P &p, const P &q) { const int ap = p.area_id(); const int aq = q.area_id(); if (ap != aq) { return ap < aq; } auto [px, py, _] = p; auto [qx, qy, __] = q; const T z = py * qx - qy * px; // p<q // <=> py/px < qy/qx (px, qx は同符号) // <=> py*qx < qy*px // <=> py*qx - qy*px < 0 if (z != 0) return z < 0; return norm(p) < norm(q); } friend bool operator==(const P &left, const P &right) { return (left.x == right.x && left.y == right.y); } friend bool operator!=(const P &left, const P &right) { return !(left == right); } // 傾きが等しいかどうか bool r_eq(const P &another) const { // y/x == a.y/a.x return y * another.x == another.y * x; } // 偏角ソート用に r_eq を使用する // (傾きが等しい場合も座標としては等しくないので,left==rightとは書かないで r_eq() を使う) friend bool operator<=(const P &left, const P &right) { return ((left < right) || left.r_eq(right)); } }; // using P = complex<ll>; // 2次元平面上の点 // using G = vc<P>; /* CCW -- BEHIND -- [a -- ON -- b] --- FRONT -- CW */ // CCW (Counter Clock Wise) 結果列挙体 enum CCW_RESULT { CCW = +1, // 反時計回り CW = -1, // 時計回り BEHIND = +2, // 広報 FRONT = -2, // 前方 ON = 0 // 2点間 }; // ベクトル A→B を基準に,点 C がどの方向にあるか(反時計回りかどうか)を調べる. // 反時計回り ― 延長線上 ― 時計回り,で 1, 0, -1 を返す. CCW_RESULT ccw(P a, P b, P c) { b -= a; c -= a; if (cross(b, c) > 0) return CCW; // counter clockwise if (cross(b, c) < 0) return CW; // clockwise if (dot(b, c) < 0) return BEHIND; // c--a--b on line if (norm(b) < norm(c)) return FRONT; // a--b--c on line return ON; } /* #endregion */ // Problem void solve() { VAR(ll, n); vll x(n), y(n); REP(i, 0, n) cin >> x[i], y[i]; // 偏角ソートして順番に割り当てる vc<P> ps(n); REP(i, 0, n) ps[i] = P(x[i], y[i], i); sort(ALL(ps)); // dump(ps); const int m = n / 2; pprint(m); REP(i, 0, m) { pprint(ps[2 * i].idx + 1, ps[2 * i + 1].idx + 1); // } } // entry point int main() { solve(); return 0; }