oj.uz

답안 #937505

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
937505 2024-03-04T07:28:34 Z nguyentunglam Golf (JOI17_golf) C++17
100 / 100
 2574 ms 286568 KB 
#include<bits/stdc++.h>
#define all(v) v.begin(), v.end()
#define endl "\n"
using namespace std;

const int N = 1e5 + 10;

vector<int> rrhx, rrhy;

int st_x, st_y, ed_x, ed_y, n, m;

tuple<int, int, int> line[N << 2];

int d[N << 2];

queue<int> q;

struct IT {
  set<pair<int, int> > T[N << 3];
  void up(int s, int l, int r, int from, int to, pair<int, int> val) {
    if (l > to || r < from) return;
    if (from <= l && r <= to) {
      T[s].insert(val);
      return;
    }
    int mid = l + r >> 1;
    up(s << 1, l, mid, from, to, val);
    up(s << 1 | 1, mid + 1, r, from, to, val);
  }
  void get (int s, int l, int r, int pos, int from, int to, int val) {
    while (!T[s].empty()) {
      auto it = T[s].lower_bound(make_pair(from, 0));
      if (it == T[s].end()) break;
      if (it -> first > to) break;
      if (d[it -> second] == 0) {
        d[it -> second] = val;
        q.push(it -> second);
      }
      T[s].erase(it);
    }
    if (l == r) return;
    int mid = l + r >> 1;
    if (pos <= mid) get(s << 1, l, mid, pos, from, to, val);
    else get(s << 1 | 1, mid + 1, r, pos, from, to, val);
  }
} itx, ity;

struct square {
  int x1, x2, y1, y2;
};

square rect[N];

vector<tuple<int, int, int> > expand (vector<pair<int, int> > p) {
  vector<tuple<int, int, int> > event;
  set<pair<int, int> > s;
  for(int i = 1; i <= n; i++) if (rect[i].x1 + 1 < rect[i].x2) {
    event.emplace_back(rect[i].x1 + 1, rect[i].y1, rect[i].y2);
    event.emplace_back(rect[i].x2, rect[i].y1, rect[i].y2);

//    cout << rect[i].x1 + 1 << " " << rect[i].y1 << " " << rect[i].y2 << endl;
//    cout << rect[i].x2 - 1 << " " << rect[i].y1 << " " << rect[i].y2 << endl;
  }
  for(auto &[x, y] : p) {
    event.emplace_back(x, y, 0);
//    cout << x << " " << y << endl;
  }

  sort(all(event), [] (const tuple<int, int, int> &x, const tuple<int, int, int> &y) {
    if (get<0> (x) != get<0> (y)) return get<0> (x) < get<0> (y);
    return get<2> (x) > get<2> (y);
       });

  vector<tuple<int, int, int> > ret;

  for(auto &[x, y, z] : event) {
    if (z == 0) {
      auto it = s.lower_bound(make_pair(y, y));
      int l = 1, r = m;
//      cout << x << " " << y << " " << s.size() << endl;
      if (it != s.end()) r = it -> first;
      if (it != s.begin()) {
        it--;
        l = it -> second;
      }
      ret.emplace_back(x, l, r);
    }
    else {
      if (s.empty()) {
        s.insert(make_pair(y, z));
      }
      else {
        auto it = s.find(make_pair(y, z));
        if (it != s.end()) s.erase(it);
        else s.insert(make_pair(y, z));
      }
    }
  }

  return ret;
}

int32_t main() {
  #define task ""

  cin.tie(0) -> sync_with_stdio(0);

  if (fopen("task.inp", "r")) {
    freopen("task.inp", "r", stdin);
    freopen("task.out", "w", stdout);
  }

  if (fopen(task".inp", "r")) {
    freopen (task".inp", "r", stdin);
    freopen (task".out", "w", stdout);
  }

  cin >> st_x >> st_y >> ed_x >> ed_y;
  cin >> n;

  for(int i = 1; i <= n; i++) cin >> rect[i].x1 >> rect[i].x2 >> rect[i].y1 >> rect[i].y2;

  rect[0].x1 = st_x; rect[0].y1 = st_y;
  rect[0].x2 = ed_x; rect[0].y2 = ed_y;

  for(int i = 0; i <= n; i++) {
    rrhx.push_back(rect[i].x1);
    rrhx.push_back(rect[i].x2);
    rrhy.push_back(rect[i].y1);
    rrhy.push_back(rect[i].y2);
  }

  sort(all(rrhx));
  rrhx.resize(unique(all(rrhx)) - rrhx.begin());
  sort(all(rrhy));
  rrhy.resize(unique(all(rrhy)) - rrhy.begin());

  m = max(rrhx.size(), rrhy.size());

  for(int i = 0; i <= n; i++) {
    rect[i].x1 = upper_bound(all(rrhx), rect[i].x1) - rrhx.begin();
    rect[i].x2 = upper_bound(all(rrhx), rect[i].x2) - rrhx.begin();
    rect[i].y1 = upper_bound(all(rrhy), rect[i].y1) - rrhy.begin();
    rect[i].y2 = upper_bound(all(rrhy), rect[i].y2) - rrhy.begin();
  }
  st_x = rect[0].x1; st_y = rect[0].y1;
  ed_x = rect[0].x2; ed_y = rect[0].y2;

//  cout << st_x << " " << st_y << " " << ed_x << " " << ed_y << endl;
//  for(int i = 1; i <= n; i++) {
//    cout << rect[i].x1 << " " << rect[i].x2 << " " << rect[i].y1 << " " << rect[i].y2 << endl;
//  }

  vector<pair<int, int> > tmp;
  tmp.emplace_back(st_x, st_y);
  tmp.emplace_back(ed_x, ed_y);
  for(int i = 1; i <= n; i++) {
    tmp.emplace_back(rect[i].x1, rect[i].y1);
    tmp.emplace_back(rect[i].x2, rect[i].y2);
  }
  vector<tuple<int, int, int> > line1 = expand(tmp);

  for(auto &[x, y] : tmp) swap(x, y);
  for(int i = 1; i <= n; i++) {
    swap(rect[i].x1, rect[i].y1);
    swap(rect[i].x2, rect[i].y2);
  }

  vector<tuple<int, int, int> > line2 = expand(tmp);

  for(int i = 1; i <= n; i++) {
    swap(rect[i].x1, rect[i].y1);
    swap(rect[i].x2, rect[i].y2);
  }

  int cnt = 0;
  for(auto &[x, y1, y2] : line1) {
    line[++cnt] = {x, y1, y2};
//    cout << x << " " << y1 << " " << y2 << endl;
    if (st_x == x && y1 <= st_y && st_y <= y2) {
      d[cnt] = 1;
      q.push(cnt);
    }
    else itx.up(1, 1, m, y1, y2, make_pair(x, cnt));
  }
  int cntx = cnt;

  for(auto &[y, x1, x2] : line2) {
    line[++cnt] = {y, x1, x2};
//    cout << y << " " << x1 << " " << x2 << endl;
    if (st_y == y && x1 <= st_x && st_x <= x2) {
      d[cnt] = 1;
      q.push(cnt);
    }
    else ity.up(1, 1, m, x1, x2, make_pair(y, cnt));
  }
//  exit(0);

  while (!q.empty()) {
    int u = q.front(); q.pop();
    if (u <= cntx) {
      int x, y1, y2; tie(x, y1, y2) = line[u];
      if (ed_x == x && y1 <= ed_y && ed_y <= y2) return cout << d[u], 0;
      ity.get(1, 1, m, x, y1, y2, d[u] + 1);
    }
    else {
      int y, x1, x2; tie(y, x1, x2) = line[u];
      if (ed_y == y && x1 <= ed_x && ed_x <= x2) return cout << d[u], 0;
      itx.get(1, 1, m, y, x1, x2, d[u] + 1);
    }
  }
}

Compilation message

golf.cpp: In member function 'void IT::up(int, int, int, int, int, std::pair<int, int>)':
golf.cpp:26:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   26 |     int mid = l + r >> 1;
      |               ~~^~~
golf.cpp: In member function 'void IT::get(int, int, int, int, int, int, int)':
golf.cpp:42:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |     int mid = l + r >> 1;
      |               ~~^~~
golf.cpp: In function 'int32_t main()':
golf.cpp:109:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  109 |     freopen("task.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
golf.cpp:110:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  110 |     freopen("task.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
golf.cpp:114:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  114 |     freopen (task".inp", "r", stdin);
      |     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
golf.cpp:115:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  115 |     freopen (task".out", "w", stdout);
      |     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 80436 KB Output is correct
2 Correct 16 ms 80476 KB Output is correct
3 Correct 17 ms 80504 KB Output is correct
4 Correct 17 ms 80476 KB Output is correct
5 Correct 23 ms 81500 KB Output is correct
6 Correct 22 ms 81500 KB Output is correct
7 Correct 22 ms 81500 KB Output is correct
8 Correct 22 ms 81500 KB Output is correct
9 Correct 22 ms 81500 KB Output is correct
10 Correct 21 ms 81500 KB Output is correct
11 Correct 21 ms 81500 KB Output is correct
12 Correct 21 ms 81500 KB Output is correct
13 Correct 21 ms 81500 KB Output is correct
14 Correct 22 ms 81492 KB Output is correct
15 Correct 18 ms 80988 KB Output is correct
16 Correct 22 ms 81756 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 80436 KB Output is correct
2 Correct 16 ms 80476 KB Output is correct
3 Correct 17 ms 80504 KB Output is correct
4 Correct 17 ms 80476 KB Output is correct
5 Correct 23 ms 81500 KB Output is correct
6 Correct 22 ms 81500 KB Output is correct
7 Correct 22 ms 81500 KB Output is correct
8 Correct 22 ms 81500 KB Output is correct
9 Correct 22 ms 81500 KB Output is correct
10 Correct 21 ms 81500 KB Output is correct
11 Correct 21 ms 81500 KB Output is correct
12 Correct 21 ms 81500 KB Output is correct
13 Correct 21 ms 81500 KB Output is correct
14 Correct 22 ms 81492 KB Output is correct
15 Correct 18 ms 80988 KB Output is correct
16 Correct 22 ms 81756 KB Output is correct
17 Correct 23 ms 81704 KB Output is correct
18 Correct 24 ms 81756 KB Output is correct
19 Correct 22 ms 81756 KB Output is correct
20 Correct 22 ms 81756 KB Output is correct
21 Correct 22 ms 81756 KB Output is correct
22 Correct 23 ms 81756 KB Output is correct
23 Correct 22 ms 81756 KB Output is correct
24 Correct 23 ms 81756 KB Output is correct
25 Correct 21 ms 81756 KB Output is correct
26 Correct 22 ms 81756 KB Output is correct
27 Correct 21 ms 81244 KB Output is correct
28 Correct 22 ms 82012 KB Output is correct
29 Correct 22 ms 81924 KB Output is correct

Subtask #3
70.0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 80436 KB Output is correct
2 Correct 16 ms 80476 KB Output is correct
3 Correct 17 ms 80504 KB Output is correct
4 Correct 17 ms 80476 KB Output is correct
5 Correct 23 ms 81500 KB Output is correct
6 Correct 22 ms 81500 KB Output is correct
7 Correct 22 ms 81500 KB Output is correct
8 Correct 22 ms 81500 KB Output is correct
9 Correct 22 ms 81500 KB Output is correct
10 Correct 21 ms 81500 KB Output is correct
11 Correct 21 ms 81500 KB Output is correct
12 Correct 21 ms 81500 KB Output is correct
13 Correct 21 ms 81500 KB Output is correct
14 Correct 22 ms 81492 KB Output is correct
15 Correct 18 ms 80988 KB Output is correct
16 Correct 22 ms 81756 KB Output is correct
17 Correct 23 ms 81704 KB Output is correct
18 Correct 24 ms 81756 KB Output is correct
19 Correct 22 ms 81756 KB Output is correct
20 Correct 22 ms 81756 KB Output is correct
21 Correct 22 ms 81756 KB Output is correct
22 Correct 23 ms 81756 KB Output is correct
23 Correct 22 ms 81756 KB Output is correct
24 Correct 23 ms 81756 KB Output is correct
25 Correct 21 ms 81756 KB Output is correct
26 Correct 22 ms 81756 KB Output is correct
27 Correct 21 ms 81244 KB Output is correct
28 Correct 22 ms 82012 KB Output is correct
29 Correct 22 ms 81924 KB Output is correct
30 Correct 2156 ms 280268 KB Output is correct
31 Correct 1914 ms 281624 KB Output is correct
32 Correct 2444 ms 279432 KB Output is correct
33 Correct 2574 ms 281520 KB Output is correct
34 Correct 2366 ms 286568 KB Output is correct
35 Correct 2384 ms 284460 KB Output is correct
36 Correct 2159 ms 283516 KB Output is correct
37 Correct 2058 ms 280636 KB Output is correct
38 Correct 2247 ms 284656 KB Output is correct
39 Correct 2200 ms 281192 KB Output is correct
40 Correct 243 ms 113856 KB Output is correct
41 Correct 238 ms 114016 KB Output is correct
42 Correct 242 ms 113576 KB Output is correct
43 Correct 247 ms 113480 KB Output is correct
44 Correct 231 ms 114508 KB Output is correct
45 Correct 243 ms 114592 KB Output is correct
46 Correct 241 ms 113900 KB Output is correct
47 Correct 243 ms 114876 KB Output is correct
48 Correct 238 ms 114028 KB Output is correct
49 Correct 249 ms 114164 KB Output is correct
50 Correct 24 ms 82036 KB Output is correct
51 Correct 21 ms 82012 KB Output is correct
52 Correct 21 ms 82012 KB Output is correct