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Submission #724078

# Submission time Handle Problem Language Result Execution time Memory
724078 2023-04-14T16:57:15 Z bitaro1337 Abracadabra (CEOI22_abracadabra) C++14
100 / 100
 1569 ms 100116 KB 
//BITARO BITARO BITARO
#include <bits/stdc++.h>
using namespace std;

const int N = 2e6 + 5;
int ans[N], a[N], nxt[N], fen[N], total_len, ttp;
vector<array<int, 3>> values;
vector<pair<int, int>> queries[N];
set<array<int, 3>> s;
int n, q;

void modif(int u, int val) {
    for(int i = u + 1; i < N; i += i & -i) fen[i] += val;
}
int query(int u) {
    int ret = 0;
    for(int i = u + 1; i >= 1; i -= i & -i) ret += fen[i];
    return ret;
}

int id(array<int, 3> x) {
    return lower_bound(values.begin(), values.end(), x) - values.begin();
}
void fix() {
    while(true) {
        int A = (*s.rbegin())[1], B = (*s.rbegin())[2];
        if(total_len - (B - A + 1) >= n / 2) {
            s.erase(--s.end());
            total_len -= B - A + 1;
        }
        else break;
    }
}
void add(int x, int y) {
    s.insert({a[x], x, y});
    total_len += y - x + 1;
    if(!ttp) values.push_back({a[x], x, y});
    else modif(id({a[x], x, y}), y - x + 1);
}
void go(int l, int r) {
    for(int i = l; i <= r; i = nxt[i]) {
        add(i, min(nxt[i] - 1, r));
    }
}
void remove_middle() {
    if(total_len == n / 2) return;
    array<int, 3> x = *--s.end();
    s.erase(--s.end());
    if(ttp) modif(id(x), -(x[2] - x[1] + 1));
    int l = x[1], r = x[2];
    total_len -= r - l + 1;
    int need_add = n / 2 - total_len;
    add(l, l + need_add - 1);
    go(l + need_add, r);
}

int main() {
    cin >> n >> q;
    for(int i = 1; i <= n; ++i) cin >> a[i];
    for(int i = 1, t, pos; i <= q; ++i) {
        cin >> t >> pos; t = min(t, n);
        queries[t].push_back(make_pair(i, pos));
    }
    stack<int> st;
    for(int i = n; i >= 1; --i) {
        while(!st.empty() && a[st.top()] < a[i]) st.pop();
        nxt[i] = (st.empty() ? n + 1 : st.top());
        st.push(i);
    }
    go(1, n);
    while(true) {
        fix();
        if(total_len == n / 2) break;
        remove_middle();
    }
    s.clear(); ttp = 1; total_len = 0;
    sort(values.begin(), values.end());
    values.erase(unique(values.begin(), values.end()), values.end());
    go(1, n);
    for(int t = 0; t <= n; ++t) {
        for(auto x: queries[t]) {
            int pos = x.second, idx = x.first;
            int f = -1, l = 0, r = N - 1;
            while(l <= r) {
                int mid = l + r >> 1;
                if(query(mid) < pos) {
                    l = mid + 1;
                    f = mid;
                } else {
                    r = mid - 1;
                }
            }
            if(f >= 0) pos -= query(f);
            ++f;
            ans[idx] = a[values[f][1] + pos - 1];
        }
        if(total_len > n / 2) {
            fix();
            remove_middle();
        }
    }
    for(int i = 1; i <= q; ++i) {
        cout << ans[i] << "\n";
    }
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:85:29: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   85 |                 int mid = l + r >> 1;
      |                           ~~^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 811 ms 65548 KB Output is correct
2 Correct 768 ms 71620 KB Output is correct
3 Correct 726 ms 71080 KB Output is correct
4 Correct 631 ms 68924 KB Output is correct
5 Correct 678 ms 73100 KB Output is correct
6 Correct 662 ms 73036 KB Output is correct
7 Correct 689 ms 73672 KB Output is correct
8 Correct 638 ms 71404 KB Output is correct
9 Correct 671 ms 70648 KB Output is correct
10 Correct 715 ms 70200 KB Output is correct
11 Correct 637 ms 70512 KB Output is correct
12 Correct 611 ms 67956 KB Output is correct
13 Correct 616 ms 69404 KB Output is correct
14 Correct 664 ms 72328 KB Output is correct
15 Correct 633 ms 70240 KB Output is correct
16 Correct 22 ms 47316 KB Output is correct
17 Correct 709 ms 68228 KB Output is correct
18 Correct 605 ms 68104 KB Output is correct
19 Correct 24 ms 47316 KB Output is correct
20 Correct 23 ms 47256 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1227 ms 79676 KB Output is correct
2 Correct 1160 ms 94692 KB Output is correct
3 Correct 947 ms 89272 KB Output is correct
4 Correct 851 ms 78544 KB Output is correct
5 Correct 881 ms 79504 KB Output is correct
6 Correct 833 ms 78056 KB Output is correct
7 Correct 997 ms 82684 KB Output is correct
8 Correct 961 ms 82148 KB Output is correct
9 Correct 822 ms 78760 KB Output is correct
10 Correct 897 ms 78596 KB Output is correct
11 Correct 711 ms 72716 KB Output is correct
12 Correct 718 ms 73620 KB Output is correct
13 Correct 833 ms 77692 KB Output is correct
14 Correct 710 ms 74060 KB Output is correct
15 Correct 866 ms 79164 KB Output is correct
16 Correct 93 ms 50128 KB Output is correct
17 Correct 965 ms 91388 KB Output is correct
18 Correct 643 ms 70784 KB Output is correct
19 Correct 218 ms 55500 KB Output is correct
20 Correct 272 ms 57128 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 251 ms 57404 KB Output is correct
2 Correct 238 ms 57440 KB Output is correct
3 Correct 256 ms 56172 KB Output is correct
4 Correct 157 ms 51252 KB Output is correct
5 Correct 251 ms 55076 KB Output is correct
6 Correct 161 ms 51592 KB Output is correct
7 Correct 195 ms 53496 KB Output is correct
8 Correct 176 ms 52532 KB Output is correct
9 Correct 201 ms 53760 KB Output is correct
10 Correct 135 ms 50336 KB Output is correct
11 Correct 135 ms 50696 KB Output is correct
12 Correct 127 ms 50364 KB Output is correct
13 Correct 143 ms 50404 KB Output is correct
14 Correct 132 ms 50496 KB Output is correct
15 Correct 123 ms 50176 KB Output is correct
16 Correct 52 ms 48208 KB Output is correct
17 Correct 213 ms 57660 KB Output is correct
18 Correct 115 ms 49868 KB Output is correct
19 Correct 24 ms 47316 KB Output is correct
20 Correct 24 ms 47264 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 811 ms 65548 KB Output is correct
2 Correct 768 ms 71620 KB Output is correct
3 Correct 726 ms 71080 KB Output is correct
4 Correct 631 ms 68924 KB Output is correct
5 Correct 678 ms 73100 KB Output is correct
6 Correct 662 ms 73036 KB Output is correct
7 Correct 689 ms 73672 KB Output is correct
8 Correct 638 ms 71404 KB Output is correct
9 Correct 671 ms 70648 KB Output is correct
10 Correct 715 ms 70200 KB Output is correct
11 Correct 637 ms 70512 KB Output is correct
12 Correct 611 ms 67956 KB Output is correct
13 Correct 616 ms 69404 KB Output is correct
14 Correct 664 ms 72328 KB Output is correct
15 Correct 633 ms 70240 KB Output is correct
16 Correct 22 ms 47316 KB Output is correct
17 Correct 709 ms 68228 KB Output is correct
18 Correct 605 ms 68104 KB Output is correct
19 Correct 24 ms 47316 KB Output is correct
20 Correct 23 ms 47256 KB Output is correct
21 Correct 1227 ms 79676 KB Output is correct
22 Correct 1160 ms 94692 KB Output is correct
23 Correct 947 ms 89272 KB Output is correct
24 Correct 851 ms 78544 KB Output is correct
25 Correct 881 ms 79504 KB Output is correct
26 Correct 833 ms 78056 KB Output is correct
27 Correct 997 ms 82684 KB Output is correct
28 Correct 961 ms 82148 KB Output is correct
29 Correct 822 ms 78760 KB Output is correct
30 Correct 897 ms 78596 KB Output is correct
31 Correct 711 ms 72716 KB Output is correct
32 Correct 718 ms 73620 KB Output is correct
33 Correct 833 ms 77692 KB Output is correct
34 Correct 710 ms 74060 KB Output is correct
35 Correct 866 ms 79164 KB Output is correct
36 Correct 93 ms 50128 KB Output is correct
37 Correct 965 ms 91388 KB Output is correct
38 Correct 643 ms 70784 KB Output is correct
39 Correct 218 ms 55500 KB Output is correct
40 Correct 272 ms 57128 KB Output is correct
41 Correct 251 ms 57404 KB Output is correct
42 Correct 238 ms 57440 KB Output is correct
43 Correct 256 ms 56172 KB Output is correct
44 Correct 157 ms 51252 KB Output is correct
45 Correct 251 ms 55076 KB Output is correct
46 Correct 161 ms 51592 KB Output is correct
47 Correct 195 ms 53496 KB Output is correct
48 Correct 176 ms 52532 KB Output is correct
49 Correct 201 ms 53760 KB Output is correct
50 Correct 135 ms 50336 KB Output is correct
51 Correct 135 ms 50696 KB Output is correct
52 Correct 127 ms 50364 KB Output is correct
53 Correct 143 ms 50404 KB Output is correct
54 Correct 132 ms 50496 KB Output is correct
55 Correct 123 ms 50176 KB Output is correct
56 Correct 52 ms 48208 KB Output is correct
57 Correct 213 ms 57660 KB Output is correct
58 Correct 115 ms 49868 KB Output is correct
59 Correct 24 ms 47316 KB Output is correct
60 Correct 24 ms 47264 KB Output is correct
61 Correct 1569 ms 100116 KB Output is correct
62 Correct 1448 ms 98944 KB Output is correct
63 Correct 1452 ms 95140 KB Output is correct
64 Correct 1142 ms 88100 KB Output is correct
65 Correct 1314 ms 90140 KB Output is correct
66 Correct 1203 ms 88120 KB Output is correct
67 Correct 1085 ms 84916 KB Output is correct
68 Correct 1083 ms 84444 KB Output is correct
69 Correct 1082 ms 86960 KB Output is correct
70 Correct 944 ms 81192 KB Output is correct
71 Correct 871 ms 82100 KB Output is correct
72 Correct 948 ms 81668 KB Output is correct
73 Correct 891 ms 81752 KB Output is correct
74 Correct 911 ms 84040 KB Output is correct
75 Correct 931 ms 82580 KB Output is correct
76 Correct 81 ms 50176 KB Output is correct
77 Correct 1135 ms 91484 KB Output is correct
78 Correct 730 ms 75536 KB Output is correct
79 Correct 28 ms 47276 KB Output is correct
80 Correct 25 ms 47280 KB Output is correct