oj.uz

Submission #708772

# Submission time Handle Problem Language Result Execution time Memory
708772 2023-03-12T09:24:09 Z becaido Abracadabra (CEOI22_abracadabra) C++17
100 / 100
 549 ms 40472 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout (T t, U...u) {cout << t << (sizeof... (u) ? ", " : ""), dout (u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

const int SIZE = 2e5 + 5;
const int QSIZ = 1e6 + 5;

int n, q;
int a[SIZE], p[SIZE], nxt[SIZE], cnt[SIZE];

int ans[QSIZ];
tuple<int, int, int> ask[QSIZ];

int bit[SIZE];
void upd(int pos, int x) {
    for (; pos <= n; pos += pos & -pos) bit[pos] += x;
}
int que(int pos) {
    int re = 0;
    for (; pos; pos -= pos & -pos) re += bit[pos];
    return re;
}
pair<int, int> sch(int x) {
    int pos = 0, sum = 0;
    for (int i = __lg(n); i >= 0; i--) if (pos + (1 << i) <= n && sum + bit[pos + (1 << i)] <= x) {
        sum += bit[pos += 1 << i];
    }
    return {pos + 1, sum};
}

bool work() {
    auto [k, sum] = sch(n / 2);
    if (sum == n / 2) return 0;
    int len = cnt[k] - (n / 2 - sum);
    upd(k, -len);
    cnt[k] -= len;
    for (int x = a[p[k] + (n / 2 - sum)]; x && !cnt[x]; x = nxt[x]) {
        cnt[x] = (nxt[x] && !cnt[nxt[x]] ? p[nxt[x]] - p[x] : len);
        len -= cnt[x];
        upd(x, cnt[x]);
    }
    return 1;
}

int cal(int i) {
    auto [k, sum] = sch(i - 1);
    return a[p[k] + (i - sum - 1)];
}

void solve() {
    cin >> n >> q;
    FOR (i, 1, n) cin >> a[i], p[a[i]] = i;
    FOR (i, 1, q) {
        auto &[t, k, id] = ask[i];
        cin >> t >> k;
        id = i;
    }
    sort(ask + 1, ask + q + 1);

    vector<int> st;
    for (int i = n; i >= 1; i--) {
        while (st.size() && a[i] > st.back()) st.pop_back();
        if (st.size()) nxt[a[i]] = st.back();
        st.pb(a[i]);
    }
    for (int x = a[1]; x; x = nxt[x]) {
        cnt[x] = (nxt[x] ? p[nxt[x]] : n + 1) - p[x];
        upd(x, cnt[x]);
    }

    int cur = 0, f = 1;
    FOR (i, 1, q) {
        auto &[t, k, id] = ask[i];
        while (f && cur < t) {
            cur++;
            f &= work();
        }
        ans[id] = cal(k);
    }
    FOR (i, 1, q) cout << ans[i] << '\n';
}

int main() {
    Waimai;
    solve();
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 321 ms 20172 KB Output is correct
2 Correct 343 ms 20172 KB Output is correct
3 Correct 317 ms 19276 KB Output is correct
4 Correct 332 ms 19188 KB Output is correct
5 Correct 333 ms 20056 KB Output is correct
6 Correct 313 ms 19312 KB Output is correct
7 Correct 328 ms 20096 KB Output is correct
8 Correct 312 ms 19512 KB Output is correct
9 Correct 317 ms 19172 KB Output is correct
10 Correct 315 ms 19564 KB Output is correct
11 Correct 323 ms 19472 KB Output is correct
12 Correct 308 ms 19348 KB Output is correct
13 Correct 328 ms 19640 KB Output is correct
14 Correct 326 ms 19788 KB Output is correct
15 Correct 343 ms 20304 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 296 ms 19512 KB Output is correct
18 Correct 322 ms 19360 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 398 ms 29448 KB Output is correct
2 Correct 380 ms 40472 KB Output is correct
3 Correct 316 ms 31720 KB Output is correct
4 Correct 325 ms 32128 KB Output is correct
5 Correct 362 ms 32776 KB Output is correct
6 Correct 318 ms 31572 KB Output is correct
7 Correct 354 ms 39504 KB Output is correct
8 Correct 452 ms 37884 KB Output is correct
9 Correct 358 ms 32700 KB Output is correct
10 Correct 405 ms 36772 KB Output is correct
11 Correct 331 ms 30972 KB Output is correct
12 Correct 330 ms 30712 KB Output is correct
13 Correct 373 ms 36096 KB Output is correct
14 Correct 388 ms 31792 KB Output is correct
15 Correct 391 ms 37824 KB Output is correct
16 Correct 22 ms 4940 KB Output is correct
17 Correct 345 ms 35280 KB Output is correct
18 Correct 293 ms 26656 KB Output is correct
19 Correct 86 ms 9864 KB Output is correct
20 Correct 97 ms 12660 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 4936 KB Output is correct
2 Correct 56 ms 6556 KB Output is correct
3 Correct 59 ms 6044 KB Output is correct
4 Correct 50 ms 5848 KB Output is correct
5 Correct 53 ms 6040 KB Output is correct
6 Correct 60 ms 5832 KB Output is correct
7 Correct 52 ms 6140 KB Output is correct
8 Correct 49 ms 5880 KB Output is correct
9 Correct 49 ms 5964 KB Output is correct
10 Correct 62 ms 5708 KB Output is correct
11 Correct 62 ms 5816 KB Output is correct
12 Correct 45 ms 5704 KB Output is correct
13 Correct 52 ms 5780 KB Output is correct
14 Correct 49 ms 5852 KB Output is correct
15 Correct 45 ms 5760 KB Output is correct
16 Correct 11 ms 2772 KB Output is correct
17 Correct 43 ms 6032 KB Output is correct
18 Correct 55 ms 4408 KB Output is correct
19 Correct 0 ms 328 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 321 ms 20172 KB Output is correct
2 Correct 343 ms 20172 KB Output is correct
3 Correct 317 ms 19276 KB Output is correct
4 Correct 332 ms 19188 KB Output is correct
5 Correct 333 ms 20056 KB Output is correct
6 Correct 313 ms 19312 KB Output is correct
7 Correct 328 ms 20096 KB Output is correct
8 Correct 312 ms 19512 KB Output is correct
9 Correct 317 ms 19172 KB Output is correct
10 Correct 315 ms 19564 KB Output is correct
11 Correct 323 ms 19472 KB Output is correct
12 Correct 308 ms 19348 KB Output is correct
13 Correct 328 ms 19640 KB Output is correct
14 Correct 326 ms 19788 KB Output is correct
15 Correct 343 ms 20304 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 296 ms 19512 KB Output is correct
18 Correct 322 ms 19360 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 398 ms 29448 KB Output is correct
22 Correct 380 ms 40472 KB Output is correct
23 Correct 316 ms 31720 KB Output is correct
24 Correct 325 ms 32128 KB Output is correct
25 Correct 362 ms 32776 KB Output is correct
26 Correct 318 ms 31572 KB Output is correct
27 Correct 354 ms 39504 KB Output is correct
28 Correct 452 ms 37884 KB Output is correct
29 Correct 358 ms 32700 KB Output is correct
30 Correct 405 ms 36772 KB Output is correct
31 Correct 331 ms 30972 KB Output is correct
32 Correct 330 ms 30712 KB Output is correct
33 Correct 373 ms 36096 KB Output is correct
34 Correct 388 ms 31792 KB Output is correct
35 Correct 391 ms 37824 KB Output is correct
36 Correct 22 ms 4940 KB Output is correct
37 Correct 345 ms 35280 KB Output is correct
38 Correct 293 ms 26656 KB Output is correct
39 Correct 86 ms 9864 KB Output is correct
40 Correct 97 ms 12660 KB Output is correct
41 Correct 65 ms 4936 KB Output is correct
42 Correct 56 ms 6556 KB Output is correct
43 Correct 59 ms 6044 KB Output is correct
44 Correct 50 ms 5848 KB Output is correct
45 Correct 53 ms 6040 KB Output is correct
46 Correct 60 ms 5832 KB Output is correct
47 Correct 52 ms 6140 KB Output is correct
48 Correct 49 ms 5880 KB Output is correct
49 Correct 49 ms 5964 KB Output is correct
50 Correct 62 ms 5708 KB Output is correct
51 Correct 62 ms 5816 KB Output is correct
52 Correct 45 ms 5704 KB Output is correct
53 Correct 52 ms 5780 KB Output is correct
54 Correct 49 ms 5852 KB Output is correct
55 Correct 45 ms 5760 KB Output is correct
56 Correct 11 ms 2772 KB Output is correct
57 Correct 43 ms 6032 KB Output is correct
58 Correct 55 ms 4408 KB Output is correct
59 Correct 0 ms 328 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 528 ms 39752 KB Output is correct
62 Correct 549 ms 40252 KB Output is correct
63 Correct 528 ms 38284 KB Output is correct
64 Correct 475 ms 37860 KB Output is correct
65 Correct 448 ms 39432 KB Output is correct
66 Correct 429 ms 37684 KB Output is correct
67 Correct 442 ms 39012 KB Output is correct
68 Correct 440 ms 37612 KB Output is correct
69 Correct 433 ms 37588 KB Output is correct
70 Correct 418 ms 37168 KB Output is correct
71 Correct 405 ms 36424 KB Output is correct
72 Correct 431 ms 36872 KB Output is correct
73 Correct 411 ms 36892 KB Output is correct
74 Correct 414 ms 37892 KB Output is correct
75 Correct 412 ms 38068 KB Output is correct
76 Correct 21 ms 4900 KB Output is correct
77 Correct 384 ms 35504 KB Output is correct
78 Correct 373 ms 32252 KB Output is correct
79 Correct 1 ms 340 KB Output is correct
80 Correct 0 ms 328 KB Output is correct