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답안 #598982

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
598982 2022-07-19T08:38:16 Z Plurm Hedgehog Daniyar and Algorithms (IZhO19_sortbooks) C++11
100 / 100
 2657 ms 66496 KB 
#include <bits/stdc++.h>
using namespace std;

int w[1000005];
int ans[1000005];

int rt[4000005];
int lb[4000005];
int rb[4000005];

void build(int c, int l, int r) {
  lb[c] = l;
  rb[c] = r;
  rt[c] = 1e9;
  int k = (l + r) / 2;
  if (l != r) {
    build(2 * c, l, k);
    build(2 * c + 1, k + 1, r);
  }
}

void update(int c, int l, int r, int x) {
  if (lb[c] == l && rb[c] == r) {
    rt[c] = min(rt[c], x);
    return;
  }
  int k = (lb[c] + rb[c]) / 2;
  if (l <= k && k < r) {
    update(2 * c, l, k, x);
    update(2 * c + 1, k + 1, r, x);
  } else if (r <= k) {
    update(2 * c, l, r, x);
  } else {
    update(2 * c + 1, l, r, x);
  }
}

int query(int c, int i, int mx = 1e9) {
  mx = min(mx, rt[c]);
  if (lb[c] == rb[c])
    return mx;
  int k = (lb[c] + rb[c]) / 2;
  if (i <= k)
    return query(2 * c, i, mx);
  else
    return query(2 * c + 1, i, mx);
}

void maintain(int i, int j) {
  // add (i, j) to some range data structure...
  update(1, 1, i, j);
}

bool check(int i, int j) {
  // check whether there exists a pair (i', j') such that i <= i' < j' <= j in
  // the data structure
  return query(1, i) <= j;
}

int main() {
  int n, m;
  scanf("%d%d", &n, &m);
  stack<int> stk;
  vector<pair<int, int>> interesting;
  for (int i = 1; i <= n; i++) {
    scanf("%d", w + i);
    while (!stk.empty() && w[stk.top()] <= w[i])
      stk.pop();
    if (!stk.empty())
      interesting.push_back({stk.top(), i});
    stk.push(i);
  }
  while (!stk.empty())
    stk.pop();
  for (int i = n; i > 0; i--) {
    while (!stk.empty() && w[stk.top()] >= w[i])
      stk.pop();
    if (!stk.empty())
      interesting.push_back({i, stk.top()});
    stk.push(i);
  }
  sort(interesting.begin(), interesting.end(),
       [](pair<int, int> x, pair<int, int> y) {
         return w[x.first] + w[x.second] > w[y.first] + w[y.second];
       });
  vector<tuple<int, int, int, int>> queries;
  for (int i = 0; i < m; i++) {
    int l, r, k;
    scanf("%d%d%d", &l, &r, &k);
    queries.emplace_back(l, r, k, i);
  }
  sort(queries.begin(), queries.end(),
       [](tuple<int, int, int, int> x, tuple<int, int, int, int> y) {
         return get<2>(x) > get<2>(y);
       });
  build(1, 1, n);
  int lptr = 0;
  for (auto q : queries) {
    int l, r, k, i;
    tie(l, r, k, i) = q;
    while (lptr < interesting.size() &&
           w[interesting[lptr].first] + w[interesting[lptr].second] > k) {
      maintain(interesting[lptr].first, interesting[lptr].second);
      lptr++;
    }
    ans[i] = check(l, r) ? 0 : 1;
  }
  for (int i = 0; i < m; i++) {
    printf("%d\n", ans[i]);
  }
  return 0;
}

Compilation message

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:101:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  101 |     while (lptr < interesting.size() &&
      |            ~~~~~^~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:62:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |   scanf("%d%d", &n, &m);
      |   ~~~~~^~~~~~~~~~~~~~~~
sortbooks.cpp:66:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |     scanf("%d", w + i);
      |     ~~~~~^~~~~~~~~~~~~
sortbooks.cpp:89:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |     scanf("%d%d%d", &l, &r, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #2
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 3 ms 468 KB Output is correct
12 Correct 4 ms 724 KB Output is correct
13 Correct 5 ms 724 KB Output is correct
14 Correct 6 ms 852 KB Output is correct
15 Correct 5 ms 868 KB Output is correct
16 Correct 3 ms 724 KB Output is correct
17 Correct 3 ms 724 KB Output is correct
18 Correct 3 ms 724 KB Output is correct

Subtask #3
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2278 ms 66176 KB Output is correct
2 Correct 2304 ms 66336 KB Output is correct
3 Correct 2285 ms 66168 KB Output is correct
4 Correct 2351 ms 66300 KB Output is correct
5 Correct 1148 ms 50724 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 134 ms 7608 KB Output is correct
2 Correct 124 ms 7924 KB Output is correct
3 Correct 57 ms 6444 KB Output is correct
4 Correct 58 ms 6396 KB Output is correct
5 Correct 59 ms 6392 KB Output is correct
6 Correct 50 ms 6504 KB Output is correct
7 Correct 56 ms 6480 KB Output is correct
8 Correct 68 ms 7116 KB Output is correct
9 Correct 38 ms 3008 KB Output is correct
10 Correct 66 ms 7016 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 3 ms 468 KB Output is correct
12 Correct 4 ms 724 KB Output is correct
13 Correct 5 ms 724 KB Output is correct
14 Correct 6 ms 852 KB Output is correct
15 Correct 5 ms 868 KB Output is correct
16 Correct 3 ms 724 KB Output is correct
17 Correct 3 ms 724 KB Output is correct
18 Correct 3 ms 724 KB Output is correct
19 Correct 321 ms 14976 KB Output is correct
20 Correct 318 ms 15332 KB Output is correct
21 Correct 294 ms 15148 KB Output is correct
22 Correct 298 ms 15216 KB Output is correct
23 Correct 290 ms 15196 KB Output is correct
24 Correct 143 ms 12748 KB Output is correct
25 Correct 145 ms 12092 KB Output is correct
26 Correct 139 ms 12024 KB Output is correct
27 Correct 139 ms 12852 KB Output is correct
28 Correct 150 ms 12788 KB Output is correct
29 Correct 156 ms 12076 KB Output is correct
30 Correct 159 ms 12048 KB Output is correct
31 Correct 165 ms 12080 KB Output is correct
32 Correct 162 ms 12080 KB Output is correct
33 Correct 164 ms 12340 KB Output is correct
34 Correct 116 ms 12564 KB Output is correct
35 Correct 186 ms 13780 KB Output is correct
36 Correct 114 ms 14120 KB Output is correct
37 Correct 116 ms 14516 KB Output is correct
38 Correct 128 ms 14808 KB Output is correct
39 Correct 188 ms 16232 KB Output is correct
40 Correct 133 ms 12672 KB Output is correct
41 Correct 149 ms 16552 KB Output is correct

Subtask #6
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 3 ms 468 KB Output is correct
12 Correct 4 ms 724 KB Output is correct
13 Correct 5 ms 724 KB Output is correct
14 Correct 6 ms 852 KB Output is correct
15 Correct 5 ms 868 KB Output is correct
16 Correct 3 ms 724 KB Output is correct
17 Correct 3 ms 724 KB Output is correct
18 Correct 3 ms 724 KB Output is correct
19 Correct 2278 ms 66176 KB Output is correct
20 Correct 2304 ms 66336 KB Output is correct
21 Correct 2285 ms 66168 KB Output is correct
22 Correct 2351 ms 66300 KB Output is correct
23 Correct 1148 ms 50724 KB Output is correct
24 Correct 134 ms 7608 KB Output is correct
25 Correct 124 ms 7924 KB Output is correct
26 Correct 57 ms 6444 KB Output is correct
27 Correct 58 ms 6396 KB Output is correct
28 Correct 59 ms 6392 KB Output is correct
29 Correct 50 ms 6504 KB Output is correct
30 Correct 56 ms 6480 KB Output is correct
31 Correct 68 ms 7116 KB Output is correct
32 Correct 38 ms 3008 KB Output is correct
33 Correct 66 ms 7016 KB Output is correct
34 Correct 321 ms 14976 KB Output is correct
35 Correct 318 ms 15332 KB Output is correct
36 Correct 294 ms 15148 KB Output is correct
37 Correct 298 ms 15216 KB Output is correct
38 Correct 290 ms 15196 KB Output is correct
39 Correct 143 ms 12748 KB Output is correct
40 Correct 145 ms 12092 KB Output is correct
41 Correct 139 ms 12024 KB Output is correct
42 Correct 139 ms 12852 KB Output is correct
43 Correct 150 ms 12788 KB Output is correct
44 Correct 156 ms 12076 KB Output is correct
45 Correct 159 ms 12048 KB Output is correct
46 Correct 165 ms 12080 KB Output is correct
47 Correct 162 ms 12080 KB Output is correct
48 Correct 164 ms 12340 KB Output is correct
49 Correct 116 ms 12564 KB Output is correct
50 Correct 186 ms 13780 KB Output is correct
51 Correct 114 ms 14120 KB Output is correct
52 Correct 116 ms 14516 KB Output is correct
53 Correct 128 ms 14808 KB Output is correct
54 Correct 188 ms 16232 KB Output is correct
55 Correct 133 ms 12672 KB Output is correct
56 Correct 149 ms 16552 KB Output is correct
57 Correct 2657 ms 66352 KB Output is correct
58 Correct 2627 ms 66408 KB Output is correct
59 Correct 2510 ms 66324 KB Output is correct
60 Correct 2568 ms 66348 KB Output is correct
61 Correct 2494 ms 66436 KB Output is correct
62 Correct 2473 ms 66496 KB Output is correct
63 Correct 634 ms 50580 KB Output is correct
64 Correct 626 ms 50596 KB Output is correct
65 Correct 1006 ms 50704 KB Output is correct
66 Correct 976 ms 50728 KB Output is correct
67 Correct 1024 ms 50700 KB Output is correct
68 Correct 1181 ms 50700 KB Output is correct
69 Correct 1192 ms 50740 KB Output is correct
70 Correct 1146 ms 50804 KB Output is correct
71 Correct 1132 ms 50668 KB Output is correct
72 Correct 1150 ms 50708 KB Output is correct
73 Correct 566 ms 50584 KB Output is correct
74 Correct 588 ms 50656 KB Output is correct
75 Correct 565 ms 50556 KB Output is correct
76 Correct 592 ms 50564 KB Output is correct
77 Correct 582 ms 50664 KB Output is correct
78 Correct 1170 ms 55944 KB Output is correct
79 Correct 743 ms 39536 KB Output is correct
80 Correct 969 ms 58044 KB Output is correct