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답안 #529699

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
529699 2022-02-23T13:14:00 Z Alex_tz307 Examination (JOI19_examination) C++17
100 / 100
 312 ms 16008 KB 
#include <bits/stdc++.h>

using namespace std;

const int kN = 1e5;
int N, sol[kN], aib[1 + 2 * kN];

struct student {
  int x, y, z, index;
} a[2 * kN];

bool cmp1(const student &lhs, const student &rhs) {
  if (lhs.z != rhs.z) {
    return lhs.z > rhs.z;
  }
  return lhs.index < rhs.index;
}

bool cmp2(const student &lhs, const student &rhs) {
  if (lhs.x != rhs.x) {
    return lhs.x > rhs.x;
  }
  return lhs.index < rhs.index;
}

void update(int x, int v) {
  for (int i = x; i <= N; i += i & -i) {
    aib[i] += v;
  }
}

int query(int x) {
  int ans = 0;
  for (int i = x; i > 0; i = i & (i - 1)) {
    ans += aib[i];
  }
  return ans;
}

int query(int l, int r) {
  return query(r) - query(l - 1);
}

void solve(int l, int r) {
  if (r <= l) {
    return;
  }
  int mid = (l + r) / 2;
  vector<student> ev;
  for (int i = l; i <= mid; ++i) {
    if (a[i].index == -1) {
      ev.emplace_back(a[i]);
    }
  }
  for (int i = mid + 1; i <= r; ++i) {
    if (a[i].index != -1) {
      ev.emplace_back(a[i]);
    }
  }
  sort(ev.begin(), ev.end(), cmp2);
  vector<int> updates;
  for (auto it : ev) {
    int y = it.y, index = it.index;
    if (index == -1) {
      update(y, 1);
      updates.emplace_back(y);
    } else {
      sol[index] += query(y, N);
    }
  }
  ev.clear();
  for (int y : updates) {
    update(y, -1);
  }
  updates.clear();
  solve(l, mid);
  solve(mid + 1, r);
}

void testCase() {
  int n, q;
  cin >> n >> q;
  vector<int> ys(n + q);
  for (int i = 0; i < n; ++i) {
    int x, y;
    cin >> x >> y;
    a[i] = {x, y, x + y, -1};
    ys[i] = y;
  }
  for (int i = 0; i < q; ++i) {
    int x, y, z;
    cin >> x >> y >> z;
    a[n + i] = {x, y, z, i};
    ys[n + i] = y;
  }
  int m = n + q;
  sort(a, a + m, cmp1);
  sort(ys.begin(), ys.end());
  ys.erase(unique(ys.begin(), ys.end()), ys.end());
  N = ys.size();
  for (int i = 0; i < m; ++i) {
    a[i].y = distance(ys.begin(), upper_bound(ys.begin(), ys.end(), a[i].y));
  }
  ys.clear();
  solve(0, m - 1);
  for (int i = 0; i < q; ++i) {
    cout << sol[i] << '\n';
  }
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  int tests = 1;
  for (int tc = 0; tc < tests; ++tc) {
    testCase();
  }
  return 0;
}

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 7 ms 588 KB Output is correct
8 Correct 7 ms 588 KB Output is correct
9 Correct 7 ms 588 KB Output is correct
10 Correct 5 ms 588 KB Output is correct
11 Correct 7 ms 620 KB Output is correct
12 Correct 4 ms 588 KB Output is correct
13 Correct 7 ms 800 KB Output is correct
14 Correct 7 ms 708 KB Output is correct
15 Correct 7 ms 840 KB Output is correct
16 Correct 5 ms 708 KB Output is correct
17 Correct 5 ms 708 KB Output is correct
18 Correct 4 ms 588 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 272 ms 10864 KB Output is correct
2 Correct 273 ms 10876 KB Output is correct
3 Correct 271 ms 10828 KB Output is correct
4 Correct 196 ms 10536 KB Output is correct
5 Correct 260 ms 10864 KB Output is correct
6 Correct 190 ms 10560 KB Output is correct
7 Correct 276 ms 13272 KB Output is correct
8 Correct 271 ms 13184 KB Output is correct
9 Correct 267 ms 13108 KB Output is correct
10 Correct 220 ms 12724 KB Output is correct
11 Correct 173 ms 12308 KB Output is correct
12 Correct 164 ms 11572 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 272 ms 10864 KB Output is correct
2 Correct 273 ms 10876 KB Output is correct
3 Correct 271 ms 10828 KB Output is correct
4 Correct 196 ms 10536 KB Output is correct
5 Correct 260 ms 10864 KB Output is correct
6 Correct 190 ms 10560 KB Output is correct
7 Correct 276 ms 13272 KB Output is correct
8 Correct 271 ms 13184 KB Output is correct
9 Correct 267 ms 13108 KB Output is correct
10 Correct 220 ms 12724 KB Output is correct
11 Correct 173 ms 12308 KB Output is correct
12 Correct 164 ms 11572 KB Output is correct
13 Correct 296 ms 12216 KB Output is correct
14 Correct 302 ms 13680 KB Output is correct
15 Correct 279 ms 13360 KB Output is correct
16 Correct 214 ms 10968 KB Output is correct
17 Correct 281 ms 11288 KB Output is correct
18 Correct 215 ms 11388 KB Output is correct
19 Correct 296 ms 12196 KB Output is correct
20 Correct 299 ms 12620 KB Output is correct
21 Correct 289 ms 12168 KB Output is correct
22 Correct 222 ms 12596 KB Output is correct
23 Correct 179 ms 12224 KB Output is correct
24 Correct 155 ms 11572 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 7 ms 588 KB Output is correct
8 Correct 7 ms 588 KB Output is correct
9 Correct 7 ms 588 KB Output is correct
10 Correct 5 ms 588 KB Output is correct
11 Correct 7 ms 620 KB Output is correct
12 Correct 4 ms 588 KB Output is correct
13 Correct 7 ms 800 KB Output is correct
14 Correct 7 ms 708 KB Output is correct
15 Correct 7 ms 840 KB Output is correct
16 Correct 5 ms 708 KB Output is correct
17 Correct 5 ms 708 KB Output is correct
18 Correct 4 ms 588 KB Output is correct
19 Correct 272 ms 10864 KB Output is correct
20 Correct 273 ms 10876 KB Output is correct
21 Correct 271 ms 10828 KB Output is correct
22 Correct 196 ms 10536 KB Output is correct
23 Correct 260 ms 10864 KB Output is correct
24 Correct 190 ms 10560 KB Output is correct
25 Correct 276 ms 13272 KB Output is correct
26 Correct 271 ms 13184 KB Output is correct
27 Correct 267 ms 13108 KB Output is correct
28 Correct 220 ms 12724 KB Output is correct
29 Correct 173 ms 12308 KB Output is correct
30 Correct 164 ms 11572 KB Output is correct
31 Correct 296 ms 12216 KB Output is correct
32 Correct 302 ms 13680 KB Output is correct
33 Correct 279 ms 13360 KB Output is correct
34 Correct 214 ms 10968 KB Output is correct
35 Correct 281 ms 11288 KB Output is correct
36 Correct 215 ms 11388 KB Output is correct
37 Correct 296 ms 12196 KB Output is correct
38 Correct 299 ms 12620 KB Output is correct
39 Correct 289 ms 12168 KB Output is correct
40 Correct 222 ms 12596 KB Output is correct
41 Correct 179 ms 12224 KB Output is correct
42 Correct 155 ms 11572 KB Output is correct
43 Correct 303 ms 14516 KB Output is correct
44 Correct 302 ms 14544 KB Output is correct
45 Correct 312 ms 16008 KB Output is correct
46 Correct 221 ms 12092 KB Output is correct
47 Correct 291 ms 12912 KB Output is correct
48 Correct 180 ms 9212 KB Output is correct
49 Correct 303 ms 15928 KB Output is correct
50 Correct 300 ms 14448 KB Output is correct
51 Correct 306 ms 15796 KB Output is correct
52 Correct 262 ms 12856 KB Output is correct
53 Correct 180 ms 13068 KB Output is correct