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Submission #792548

# Submission time Handle Problem Language Result Execution time Memory
792548 2023-07-25T06:48:53 Z t6twotwo Abracadabra (CEOI22_abracadabra) C++17
100 / 100
 1116 ms 57684 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N, Q;
    cin >> N >> Q;
    vector<int> A(N);
    for (int &x : A) {
        cin >> x;
    }
    vector<int> queries(Q), ans(Q);
    vector<vector<int>> q(N + 1);
    for (int i = 0; i < Q; i++) {
        int t, p;
        cin >> t >> p;
        t = min(t, N);
        p--;
        queries[i] = p;
        if (t == 0) {
            ans[i] = A[p];
        } else {
            q[t].push_back(i);
        }
    }
    vector<int> f(N, N), stk;
    for (int i = N - 1; i >= 0; i--) {
        while (!stk.empty() && A[stk.back()] < A[i]) {
            stk.pop_back();
        }
        if (!stk.empty()) {
            f[i] = stk.back();
        }
        stk.push_back(i);
    }
    vector<int> bit(N + 1);
    auto add = [&](int p, int x) {
        for (int i = p; i <= N; i += i & -i) {
            bit[i] += x;
        }
    };
    auto sum = [&](int p) {
        int s = 0;
        for (int i = p; i; i -= i & -i) {
            s += bit[i];
        }
        return s;
    };
    set<tuple<int, int, int>> s, t;
    for (int i = 0; i < N; i = f[i]) {
        s.emplace(A[i], i, f[i]);
        add(A[i], f[i] - i);
    }
    int T = N;
    for (int i = 1; i <= N; i++) {
        if (T > N / 2) {
            while (1) {
                auto [_, l, r] = *prev(s.end());
                if (T - r + l < N / 2) {
                    break;
                }
                T -= r - l;
                t.insert(*prev(s.end()));
                s.erase(prev(s.end()));
            }
            if (T > N / 2) {
                auto [v, l, r] = *prev(s.end());
                s.erase(prev(s.end()));
                int m = r - T + N / 2;
                s.emplace(v, l, m);
                add(v, m - r);
                for (int i = m; i < r; i = f[i]) {
                    s.emplace(A[i], i, min(r, f[i]));
                    add(A[i], min(r, f[i]) - i);
                }
            }
        }
        for (int k : q[i]) {
            int p = queries[k];
            int l = 1, r = N;
            while (l < r) {
                int m = (l + r) / 2;
                if (sum(m) > p) {
                    r = m;
                } else {
                    l = m + 1;
                }
            }
            auto [v, L, R] = *s.lower_bound({l, 0, 0});
            if (v == l) {
                ans[k] = A[R - sum(l) + p];
            } else {
                auto [v, L, R] = *t.lower_bound({l, 0, 0});
                ans[k] = A[R - sum(l) + p];
            }
        }
    }
    for (int x : ans) {
        cout << x << "\n";
    }
    return 6/22;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 306 ms 17788 KB Output is correct
2 Correct 335 ms 16784 KB Output is correct
3 Correct 325 ms 16212 KB Output is correct
4 Correct 210 ms 16312 KB Output is correct
5 Correct 258 ms 24868 KB Output is correct
6 Correct 240 ms 23928 KB Output is correct
7 Correct 254 ms 25228 KB Output is correct
8 Correct 246 ms 23188 KB Output is correct
9 Correct 236 ms 23316 KB Output is correct
10 Correct 239 ms 22388 KB Output is correct
11 Correct 216 ms 22540 KB Output is correct
12 Correct 213 ms 20220 KB Output is correct
13 Correct 211 ms 22084 KB Output is correct
14 Correct 236 ms 24000 KB Output is correct
15 Correct 242 ms 23068 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 142 ms 17508 KB Output is correct
18 Correct 167 ms 19096 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 320 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 562 ms 38440 KB Output is correct
2 Correct 518 ms 44476 KB Output is correct
3 Correct 420 ms 41384 KB Output is correct
4 Correct 320 ms 32076 KB Output is correct
5 Correct 341 ms 32800 KB Output is correct
6 Correct 307 ms 31824 KB Output is correct
7 Correct 374 ms 32888 KB Output is correct
8 Correct 370 ms 32804 KB Output is correct
9 Correct 322 ms 31932 KB Output is correct
10 Correct 329 ms 31592 KB Output is correct
11 Correct 264 ms 30796 KB Output is correct
12 Correct 272 ms 30120 KB Output is correct
13 Correct 328 ms 32152 KB Output is correct
14 Correct 285 ms 30128 KB Output is correct
15 Correct 340 ms 31720 KB Output is correct
16 Correct 20 ms 8532 KB Output is correct
17 Correct 230 ms 42528 KB Output is correct
18 Correct 229 ms 28688 KB Output is correct
19 Correct 56 ms 12852 KB Output is correct
20 Correct 87 ms 15232 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 13516 KB Output is correct
2 Correct 108 ms 14512 KB Output is correct
3 Correct 128 ms 14332 KB Output is correct
4 Correct 56 ms 8060 KB Output is correct
5 Correct 69 ms 10960 KB Output is correct
6 Correct 50 ms 8236 KB Output is correct
7 Correct 58 ms 9856 KB Output is correct
8 Correct 57 ms 8928 KB Output is correct
9 Correct 62 ms 9908 KB Output is correct
10 Correct 43 ms 7140 KB Output is correct
11 Correct 42 ms 7496 KB Output is correct
12 Correct 42 ms 7108 KB Output is correct
13 Correct 46 ms 7312 KB Output is correct
14 Correct 48 ms 7360 KB Output is correct
15 Correct 42 ms 7132 KB Output is correct
16 Correct 9 ms 4544 KB Output is correct
17 Correct 44 ms 12708 KB Output is correct
18 Correct 29 ms 6652 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 306 ms 17788 KB Output is correct
2 Correct 335 ms 16784 KB Output is correct
3 Correct 325 ms 16212 KB Output is correct
4 Correct 210 ms 16312 KB Output is correct
5 Correct 258 ms 24868 KB Output is correct
6 Correct 240 ms 23928 KB Output is correct
7 Correct 254 ms 25228 KB Output is correct
8 Correct 246 ms 23188 KB Output is correct
9 Correct 236 ms 23316 KB Output is correct
10 Correct 239 ms 22388 KB Output is correct
11 Correct 216 ms 22540 KB Output is correct
12 Correct 213 ms 20220 KB Output is correct
13 Correct 211 ms 22084 KB Output is correct
14 Correct 236 ms 24000 KB Output is correct
15 Correct 242 ms 23068 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 142 ms 17508 KB Output is correct
18 Correct 167 ms 19096 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 320 KB Output is correct
21 Correct 562 ms 38440 KB Output is correct
22 Correct 518 ms 44476 KB Output is correct
23 Correct 420 ms 41384 KB Output is correct
24 Correct 320 ms 32076 KB Output is correct
25 Correct 341 ms 32800 KB Output is correct
26 Correct 307 ms 31824 KB Output is correct
27 Correct 374 ms 32888 KB Output is correct
28 Correct 370 ms 32804 KB Output is correct
29 Correct 322 ms 31932 KB Output is correct
30 Correct 329 ms 31592 KB Output is correct
31 Correct 264 ms 30796 KB Output is correct
32 Correct 272 ms 30120 KB Output is correct
33 Correct 328 ms 32152 KB Output is correct
34 Correct 285 ms 30128 KB Output is correct
35 Correct 340 ms 31720 KB Output is correct
36 Correct 20 ms 8532 KB Output is correct
37 Correct 230 ms 42528 KB Output is correct
38 Correct 229 ms 28688 KB Output is correct
39 Correct 56 ms 12852 KB Output is correct
40 Correct 87 ms 15232 KB Output is correct
41 Correct 100 ms 13516 KB Output is correct
42 Correct 108 ms 14512 KB Output is correct
43 Correct 128 ms 14332 KB Output is correct
44 Correct 56 ms 8060 KB Output is correct
45 Correct 69 ms 10960 KB Output is correct
46 Correct 50 ms 8236 KB Output is correct
47 Correct 58 ms 9856 KB Output is correct
48 Correct 57 ms 8928 KB Output is correct
49 Correct 62 ms 9908 KB Output is correct
50 Correct 43 ms 7140 KB Output is correct
51 Correct 42 ms 7496 KB Output is correct
52 Correct 42 ms 7108 KB Output is correct
53 Correct 46 ms 7312 KB Output is correct
54 Correct 48 ms 7360 KB Output is correct
55 Correct 42 ms 7132 KB Output is correct
56 Correct 9 ms 4544 KB Output is correct
57 Correct 44 ms 12708 KB Output is correct
58 Correct 29 ms 6652 KB Output is correct
59 Correct 1 ms 212 KB Output is correct
60 Correct 1 ms 212 KB Output is correct
61 Correct 983 ms 57684 KB Output is correct
62 Correct 1116 ms 54708 KB Output is correct
63 Correct 1107 ms 53680 KB Output is correct
64 Correct 582 ms 43068 KB Output is correct
65 Correct 532 ms 45120 KB Output is correct
66 Correct 494 ms 42956 KB Output is correct
67 Correct 499 ms 41440 KB Output is correct
68 Correct 511 ms 40732 KB Output is correct
69 Correct 607 ms 42420 KB Output is correct
70 Correct 493 ms 37856 KB Output is correct
71 Correct 364 ms 38716 KB Output is correct
72 Correct 479 ms 37956 KB Output is correct
73 Correct 449 ms 37988 KB Output is correct
74 Correct 419 ms 39736 KB Output is correct
75 Correct 483 ms 38920 KB Output is correct
76 Correct 22 ms 8636 KB Output is correct
77 Correct 248 ms 42960 KB Output is correct
78 Correct 253 ms 31904 KB Output is correct
79 Correct 1 ms 212 KB Output is correct
80 Correct 1 ms 212 KB Output is correct