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답안 #955917

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
955917 2024-03-31T17:26:57 Z chrisvilches Dragon 2 (JOI17_dragon2) C++14
60 / 100
 4000 ms 2404 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

ll Bx, By;

struct Point {
  ll x, y;
  int idx;
  Point operator-(const Point p) const { return {x - p.x, y - p.y, idx}; }
  Point operator+(const Point p) const { return {x + p.x, y + p.y, idx}; }
  ll cross(const Point p) const { return x * p.y - y * p.x; }
  bool operator<(const Point p) const { return to_upper().cross(p.to_upper()) > 0; }
  Point to_upper() const { return above() ? *this : negate(); }
  bool above() const {
    // TODO: Improve this
    const Point B{Bx, By, -1};
    return B.cross(*this) > 0;
  }
  ll operator*(const Point p) const { return x * p.x + y * p.y; }
  bool deg0(const Point p) const { return cross(p) == 0 && *this * p >= 0; }
  bool deg180(const Point p) const { return cross(p) == 0 && *this * p < 0; }
  Point negate() const { return {-x, -y, idx}; }
};

short sgn(const ll x) { return (x > 0) - (x < 0); }

short orientation(const Point o, const Point a, const Point b) {
  // assert((a - o).cross(b - o) != 0);
  return sgn((a - o).cross(b - o));
}

// template <class T>
// struct BIT {
//   BIT(const int n) : n(n) { bit.assign(n, 0); }
//   // void clear(const int n) { memset(bit, 0, n * sizeof(T)); }

//   T sum(int l, int r) { return sum(r) - sum(l - 1); }

//   void add(int idx, const T delta) {
//     for (; idx < n; idx = idx | (idx + 1)) bit[idx] += delta;
//   }

//  private:
//   int n;
//   vector<T> bit;

//   T sum(int r) {
//     T ret = 0;
//     for (; r >= 0; r = (r & (r + 1)) - 1) ret += bit[r];
//     return ret;
//   }
// };

// unordered_map<int, vector<Point>> order_by_b;

// bool cmp_by_b(Point p, Point q) {
//   p.x -= Bx;
//   q.x -= Bx;
//   p.y -= By;
//   q.y -= By;
//   const bool a1 = p.above();
//   const bool a2 = q.above();
//   if (a1 != a2) return a1;
//   return p.cross(q) > 0;
// }

// int handle_query(const vector<Point>& points1, const vector<Point>& points2,
//                  const vector<Point>& ord_b, const Point B) {
//   if (points1.empty() || points2.empty()) return 0;

//   BIT<short> active(points2.size());

//   for (const auto q : points2) {
//     if (!q.above()) {
//       active.add(q.idx, 1);
//     }
//   }

//   int total = 0;

//   int j = 0;
//   for (const Point p : points1) {
//     while (j < (int)points2.size()) {
//       const Point q = points2[j];

//       if (q.to_upper().cross(p.to_upper()) < 0) break;
//       active.add(q.idx, q.above() ? 1 : -1);

//       j++;
//     }

//     Point from_point = p;
//     Point to_point = B + (p - B).negate();

//     if (!p.above()) swap(from_point, to_point);

//     // total += 1;
//     // continue;

//     const auto it1 = lower_bound(ord_b.begin(), ord_b.end(), from_point, cmp_by_b);
//     const auto it2 = lower_bound(ord_b.begin(), ord_b.end(), to_point, cmp_by_b);

//     const int from = it1 - ord_b.begin();
//     const int to = it2 - ord_b.begin();

//     total += active.sum(from, to - 1);
//   }

//   return total;
// }

int main() {
  // ios_base::sync_with_stdio(false);
  // cin.tie(NULL);
  int N, M, Q;

  while (cin >> N >> M) {
    vector<vector<Point>> tribe_points(M + 1);
    for (int i = 0; i < N; i++) {
      Point p;
      int tribe;
      cin >> p.x >> p.y >> tribe;
      tribe_points[tribe].push_back(p);
    }

    Point A;
    cin >> A.x >> A.y;
    cin >> Bx >> By;
    cin >> Q;

    // Bx -= A.x;
    // By -= A.y;

    // for (auto& points : tribe_points) {
    //   for (auto& p : points) p = p - A;
    // }

    // for (int m = 0; m <= M; m++) {
    //   auto& points = tribe_points[m];

    //   sort(points.begin(), points.end(), cmp_by_b);
    //   for (int i = 0; i < (int)points.size(); i++) {
    //     points[i].idx = i;
    //   }
    //   order_by_b[m] = tribe_points.at(m);
    // }

    // for (auto& points : tribe_points) {
    //   sort(points.begin(), points.end());
    // }

    const Point B{Bx, By, -1};

    // map<pair<int, int>, int> memo;

    // const Point origin{0, 0, -1};
    const Point origin = A;

    while (Q--) {
      int i, j;
      cin >> i >> j;
      // if (memo.count({i, j})) {
      //   cout << memo.count({i, j}) << '\n';
      //   continue;
      // }

      // if (false && (tribe_points[i].size() > 1000 || tribe_points[j].size() > 1000)) {
      //   const int ans =
      //       handle_query(tribe_points.at(i), tribe_points.at(j), order_by_b.at(j), B);
      //   memo[{i, j}] = ans;
      //   cout << ans << '\n';
      // } else {
      int total = 0;
      for (const Point p : tribe_points[i]) {
        for (const Point q : tribe_points[j]) {
          const short or1 = orientation(p, q, origin);
          const short or2 = orientation(p, q, B);

          if (or1 == or2) continue;

          if (orientation(origin, B, p) != orientation(origin, B, q)) {
            total++;
          } else if (orientation(origin, B, p) == 1) {
            if (orientation(B, p, q) == 1 && orientation(p, origin, q) == 1) total++;
          } else {
            if (orientation(origin, p, q) == 1 && orientation(p, B, q) == 1) total++;
          }
        }
      }
      cout << total << '\n';
    }
    // }
  }
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 344 KB Output is correct
2 Correct 29 ms 348 KB Output is correct
3 Correct 48 ms 348 KB Output is correct
4 Correct 173 ms 844 KB Output is correct
5 Correct 153 ms 676 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 5 ms 348 KB Output is correct
8 Correct 10 ms 348 KB Output is correct
9 Correct 9 ms 560 KB Output is correct
10 Correct 10 ms 348 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1967 ms 1268 KB Output is correct
2 Correct 3855 ms 1464 KB Output is correct
3 Correct 81 ms 1584 KB Output is correct
4 Correct 25 ms 1616 KB Output is correct
5 Correct 26 ms 2000 KB Output is correct
6 Correct 528 ms 1456 KB Output is correct
7 Correct 527 ms 1444 KB Output is correct
8 Correct 796 ms 1108 KB Output is correct
9 Correct 706 ms 1440 KB Output is correct
10 Correct 798 ms 1300 KB Output is correct

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 344 KB Output is correct
2 Correct 29 ms 348 KB Output is correct
3 Correct 48 ms 348 KB Output is correct
4 Correct 173 ms 844 KB Output is correct
5 Correct 153 ms 676 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 5 ms 348 KB Output is correct
8 Correct 10 ms 348 KB Output is correct
9 Correct 9 ms 560 KB Output is correct
10 Correct 10 ms 348 KB Output is correct
11 Correct 1967 ms 1268 KB Output is correct
12 Correct 3855 ms 1464 KB Output is correct
13 Correct 81 ms 1584 KB Output is correct
14 Correct 25 ms 1616 KB Output is correct
15 Correct 26 ms 2000 KB Output is correct
16 Correct 528 ms 1456 KB Output is correct
17 Correct 527 ms 1444 KB Output is correct
18 Correct 796 ms 1108 KB Output is correct
19 Correct 706 ms 1440 KB Output is correct
20 Correct 798 ms 1300 KB Output is correct
21 Correct 1981 ms 1260 KB Output is correct
22 Correct 3788 ms 1616 KB Output is correct
23 Correct 2818 ms 1744 KB Output is correct
24 Correct 844 ms 2404 KB Output is correct
25 Correct 206 ms 2304 KB Output is correct
26 Correct 185 ms 2132 KB Output is correct
27 Correct 48 ms 1872 KB Output is correct
28 Correct 49 ms 1884 KB Output is correct
29 Execution timed out 4045 ms 2336 KB Time limit exceeded
30 Halted 0 ms 0 KB -