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Submission #698386

# Submission time Handle Problem Language Result Execution time Memory
698386 2023-02-13T10:47:20 Z lukadupli Abracadabra (CEOI22_abracadabra) C++14
100 / 100
 1164 ms 49956 KB 
#include <bits/stdc++.h>

#define f first
#define s second

using namespace std;

typedef pair<int, int> pii;

const int MAXN = 1 << 18, MAXQ = 1e6 + 5;

struct TourSum
{
    int nodes[2 * MAXN];

    void update(int ind, int val, int node = 1, int l = 0, int r = MAXN){
        if(r - l == 1){
            nodes[node] = val;
            return;
        }

        int m = (l + r) / 2;
        if(ind < m) update(ind, val, 2 * node, l, m);
        else update(ind, val, 2 * node + 1, m, r);

        nodes[node] = nodes[2 * node] + nodes[2 * node + 1];
    }

    int binsearch(int val, int node = 1, int l = 0, int r = MAXN){
        if(r - l == 1) return l;

        int m = (l + r) / 2;

        if(nodes[2 * node] >= val) return binsearch(val, 2 * node, l, m);
        return binsearch(val - nodes[2 * node], 2 * node + 1, m, r);
    }

    int query(int lq, int rq, int node = 1, int l = 0, int r = MAXN){
        if(l >= lq && r <= rq) return nodes[node];
        if(l >= rq || r <= lq) return 0;

        int m = (l + r) / 2;
        return query(lq, rq, 2 * node, l, m) + query(lq, rq, 2 * node + 1, m, r);
    }
};

int n, q, arr[MAXN], pos[MAXN], maxrt[MAXN];
set<int> posset;
TourSum tour;

vector<pair<pii, int>> qs;
int sol[MAXQ];

int main()
{
    cin >> n >> q;
    for(int i = 1; i <= n; i++){
        cin >> arr[i];
        pos[arr[i]] = i;
    }

    posset.insert(n + 1);
    for(int i = n; i >= 1; i--){
        maxrt[pos[i]] = *posset.lower_bound(pos[i]);
        posset.insert(pos[i]);
    }

    for(int i = 1; i <= n; i = maxrt[i]){
        tour.update(arr[i], maxrt[i] - i);
    }

    for(int i = 0; i < q; i++){
        int t, p;
        cin >> t >> p;

        qs.push_back({{t, p}, i});
    }

    sort(qs.begin(), qs.end());
    int qpos = 0;
    for(int t = 0; t <= n; t++){
        while(qpos < qs.size() && qs[qpos].f.f == t){
            int num = tour.binsearch(qs[qpos].f.s);
            sol[qs[qpos].s] = arr[pos[num] + qs[qpos].f.s - tour.query(0, num) - 1];

            qpos++;
        }
        if(qpos == qs.size()) break;

        int num = tour.binsearch(n / 2);
        int realpos = tour.query(0, num) + 1;
        int amount = tour.nodes[MAXN + num];

        if(realpos + amount == n / 2 + 1) break;

        tour.update(num, n / 2 + 1 - realpos);

        for(int i = pos[num] + n / 2 + 1 - realpos; i < pos[num] + amount; i = maxrt[i])
            tour.update(arr[i], min(maxrt[i], pos[num] + amount) - i);
    }

    while(qpos < qs.size()){
        int num = tour.binsearch(qs[qpos].f.s);
        sol[qs[qpos].s] = arr[pos[num] + qs[qpos].f.s - tour.query(0, num) - 1];

        qpos++;
    }

    for(int i = 0; i < q; i++) cout << sol[i] << '\n';

	return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:82:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |         while(qpos < qs.size() && qs[qpos].f.f == t){
      |               ~~~~~^~~~~~~~~~~
Main.cpp:88:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |         if(qpos == qs.size()) break;
      |            ~~~~~^~~~~~~~~~~~
Main.cpp:102:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  102 |     while(qpos < qs.size()){
      |           ~~~~~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 698 ms 20124 KB Output is correct
2 Correct 704 ms 23116 KB Output is correct
3 Correct 688 ms 22376 KB Output is correct
4 Correct 616 ms 22852 KB Output is correct
5 Correct 675 ms 23528 KB Output is correct
6 Correct 634 ms 22768 KB Output is correct
7 Correct 679 ms 23668 KB Output is correct
8 Correct 637 ms 22936 KB Output is correct
9 Correct 679 ms 22728 KB Output is correct
10 Correct 638 ms 23032 KB Output is correct
11 Correct 647 ms 22984 KB Output is correct
12 Correct 666 ms 22804 KB Output is correct
13 Correct 636 ms 23084 KB Output is correct
14 Correct 644 ms 23408 KB Output is correct
15 Correct 652 ms 23712 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 653 ms 23052 KB Output is correct
18 Correct 622 ms 22864 KB Output is correct
19 Correct 1 ms 320 KB Output is correct
20 Correct 1 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1027 ms 35564 KB Output is correct
2 Correct 981 ms 49396 KB Output is correct
3 Correct 837 ms 40840 KB Output is correct
4 Correct 776 ms 41488 KB Output is correct
5 Correct 845 ms 42404 KB Output is correct
6 Correct 784 ms 40744 KB Output is correct
7 Correct 934 ms 49000 KB Output is correct
8 Correct 911 ms 47016 KB Output is correct
9 Correct 847 ms 42128 KB Output is correct
10 Correct 869 ms 45856 KB Output is correct
11 Correct 785 ms 40292 KB Output is correct
12 Correct 770 ms 39976 KB Output is correct
13 Correct 921 ms 45264 KB Output is correct
14 Correct 793 ms 41236 KB Output is correct
15 Correct 883 ms 47152 KB Output is correct
16 Correct 131 ms 14256 KB Output is correct
17 Correct 809 ms 43528 KB Output is correct
18 Correct 682 ms 36500 KB Output is correct
19 Correct 267 ms 19212 KB Output is correct
20 Correct 300 ms 21988 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 182 ms 9336 KB Output is correct
2 Correct 158 ms 10996 KB Output is correct
3 Correct 157 ms 10660 KB Output is correct
4 Correct 135 ms 10576 KB Output is correct
5 Correct 163 ms 10936 KB Output is correct
6 Correct 134 ms 10492 KB Output is correct
7 Correct 173 ms 10908 KB Output is correct
8 Correct 144 ms 10484 KB Output is correct
9 Correct 147 ms 10796 KB Output is correct
10 Correct 126 ms 10276 KB Output is correct
11 Correct 146 ms 10748 KB Output is correct
12 Correct 127 ms 10284 KB Output is correct
13 Correct 133 ms 10448 KB Output is correct
14 Correct 143 ms 10796 KB Output is correct
15 Correct 128 ms 10488 KB Output is correct
16 Correct 55 ms 7488 KB Output is correct
17 Correct 135 ms 10412 KB Output is correct
18 Correct 132 ms 9532 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 698 ms 20124 KB Output is correct
2 Correct 704 ms 23116 KB Output is correct
3 Correct 688 ms 22376 KB Output is correct
4 Correct 616 ms 22852 KB Output is correct
5 Correct 675 ms 23528 KB Output is correct
6 Correct 634 ms 22768 KB Output is correct
7 Correct 679 ms 23668 KB Output is correct
8 Correct 637 ms 22936 KB Output is correct
9 Correct 679 ms 22728 KB Output is correct
10 Correct 638 ms 23032 KB Output is correct
11 Correct 647 ms 22984 KB Output is correct
12 Correct 666 ms 22804 KB Output is correct
13 Correct 636 ms 23084 KB Output is correct
14 Correct 644 ms 23408 KB Output is correct
15 Correct 652 ms 23712 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 653 ms 23052 KB Output is correct
18 Correct 622 ms 22864 KB Output is correct
19 Correct 1 ms 320 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1027 ms 35564 KB Output is correct
22 Correct 981 ms 49396 KB Output is correct
23 Correct 837 ms 40840 KB Output is correct
24 Correct 776 ms 41488 KB Output is correct
25 Correct 845 ms 42404 KB Output is correct
26 Correct 784 ms 40744 KB Output is correct
27 Correct 934 ms 49000 KB Output is correct
28 Correct 911 ms 47016 KB Output is correct
29 Correct 847 ms 42128 KB Output is correct
30 Correct 869 ms 45856 KB Output is correct
31 Correct 785 ms 40292 KB Output is correct
32 Correct 770 ms 39976 KB Output is correct
33 Correct 921 ms 45264 KB Output is correct
34 Correct 793 ms 41236 KB Output is correct
35 Correct 883 ms 47152 KB Output is correct
36 Correct 131 ms 14256 KB Output is correct
37 Correct 809 ms 43528 KB Output is correct
38 Correct 682 ms 36500 KB Output is correct
39 Correct 267 ms 19212 KB Output is correct
40 Correct 300 ms 21988 KB Output is correct
41 Correct 182 ms 9336 KB Output is correct
42 Correct 158 ms 10996 KB Output is correct
43 Correct 157 ms 10660 KB Output is correct
44 Correct 135 ms 10576 KB Output is correct
45 Correct 163 ms 10936 KB Output is correct
46 Correct 134 ms 10492 KB Output is correct
47 Correct 173 ms 10908 KB Output is correct
48 Correct 144 ms 10484 KB Output is correct
49 Correct 147 ms 10796 KB Output is correct
50 Correct 126 ms 10276 KB Output is correct
51 Correct 146 ms 10748 KB Output is correct
52 Correct 127 ms 10284 KB Output is correct
53 Correct 133 ms 10448 KB Output is correct
54 Correct 143 ms 10796 KB Output is correct
55 Correct 128 ms 10488 KB Output is correct
56 Correct 55 ms 7488 KB Output is correct
57 Correct 135 ms 10412 KB Output is correct
58 Correct 132 ms 9532 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 1109 ms 49956 KB Output is correct
62 Correct 1152 ms 49164 KB Output is correct
63 Correct 1164 ms 47472 KB Output is correct
64 Correct 985 ms 47236 KB Output is correct
65 Correct 1006 ms 48956 KB Output is correct
66 Correct 948 ms 46984 KB Output is correct
67 Correct 970 ms 48572 KB Output is correct
68 Correct 961 ms 46672 KB Output is correct
69 Correct 948 ms 47280 KB Output is correct
70 Correct 949 ms 46272 KB Output is correct
71 Correct 868 ms 45832 KB Output is correct
72 Correct 926 ms 46100 KB Output is correct
73 Correct 894 ms 46092 KB Output is correct
74 Correct 943 ms 47444 KB Output is correct
75 Correct 923 ms 47628 KB Output is correct
76 Correct 139 ms 14284 KB Output is correct
77 Correct 830 ms 43988 KB Output is correct
78 Correct 782 ms 42204 KB Output is correct
79 Correct 0 ms 340 KB Output is correct
80 Correct 0 ms 340 KB Output is correct