oj.uz

Submission #752789

# Submission time Handle Problem Language Result Execution time Memory
752789 2023-06-03T20:55:59 Z math_rabbit_1028 Abracadabra (CEOI22_abracadabra) C++14
0 / 100
 386 ms 34220 KB 
#include <bits/stdc++.h>
using namespace std;
int n, q, arr[202020];
 
int ans[1010101];
int res[202020];
int nxt[202020];
stack< pair<int, int> > S;
 
int qnum = 0;
struct query {
    int time, idx, ord;
    bool operator<(const query &other) const {
        if (time == other.time) return idx < other.idx;
        return time > other.time;
    }
} queries[1010101];
 
struct segment {
    int first, st, ed, sz;
    bool operator<(const segment &other) const {
        return first > other.first;
    }
};
set<segment> segs;
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
 
    cin >> n >> q;
    for (int i = 1; i <= n; i++) cin >> arr[i];
 
    for (int i = 1; i <= q; i++) {
        cin >> queries[i].time >> queries[i].idx;
        queries[i].ord = i;
    }
    sort(queries + 1, queries + q + 1);
 
    while (1) {
        if (queries[qnum].time > 0) break;
        ans[queries[qnum].ord] = arr[queries[qnum].idx];
        qnum++;
    }

    for (int i = 1; i <= n; i++) {
        while (!S.empty()) {
            if (S.top().second < arr[i]) {
                nxt[S.top().first] = i;
                S.pop();
            }
            else break;
        }
        S.push({i, arr[i]});
    }
    while (!S.empty()) {
        nxt[S.top().first] = n + 1;
        S.pop();
    }
 
    int k = 1;
    while (nxt[k] <= n/2) {
        segs.insert({arr[k], k, nxt[k] - 1, nxt[k] - k});
        k = nxt[k];
    }
    segs.insert({arr[k], k, n/2, n/2 - k + 1});
 
    k = n/2 + 1;
    while (nxt[k] <= n) {
        segs.insert({arr[k], k, nxt[k] - 1, nxt[k] - k});
        k = nxt[k];
    }
    segs.insert({arr[k], k, n, n - k + 1});
 
    int cnt = 0, p = n;
    for (int t = 1; t <= queries[q].time; t++) {
        if (queries[q].time == t) {
            for (set<segment>::iterator iter = segs.begin(); iter != segs.end(); iter++) {
                for (int i = iter->ed; i >= iter->st; i--) {
                    res[p--] = arr[i];
                }
            }
        }
        while (1) {
            if (queries[qnum].time != t) break;
            ans[queries[qnum].ord] = res[queries[qnum].idx];
            qnum++;
        }

        if (queries[q].time == t) break;

        while (1) {
            if (cnt + segs.begin()->sz > n/2) break;
            cnt += segs.begin()->sz;
            for (int i = segs.begin()->ed; i >= segs.begin()->st; i--) {
                assert(p >= 1);
                res[p--] = arr[i];
            }
            segs.erase(segs.begin());
        }
        if (cnt >= n/2) continue;
        segment div = *segs.begin();
        segs.erase(segs.begin());
        segs.insert({div.first, div.st, div.st + cnt + div.sz - n/2 - 1, cnt + div.sz - n/2});
        k = div.st + cnt + div.sz - n/2;
        while (nxt[k] <= div.ed) {
            segs.insert({arr[k], k, nxt[k] - 1, nxt[k] - k});
            k = nxt[k];
        }
        segs.insert({arr[k], k, div.ed, div.ed - k + 1});
    }
 
    for (int i = 1; i <= q; i++) cout << ans[i] << "\n";
 
    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 276 ms 14080 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 320 ms 28168 KB Output is correct
2 Correct 386 ms 34220 KB Output is correct
3 Correct 287 ms 25796 KB Output is correct
4 Correct 274 ms 22164 KB Output is correct
5 Correct 284 ms 23612 KB Output is correct
6 Correct 245 ms 21196 KB Output is correct
7 Correct 329 ms 26176 KB Output is correct
8 Correct 290 ms 25576 KB Output is correct
9 Correct 278 ms 22856 KB Output is correct
10 Correct 283 ms 24064 KB Output is correct
11 Correct 289 ms 20320 KB Output is correct
12 Correct 253 ms 19908 KB Output is correct
13 Correct 284 ms 23856 KB Output is correct
14 Correct 254 ms 20468 KB Output is correct
15 Correct 312 ms 24432 KB Output is correct
16 Correct 19 ms 2640 KB Output is correct
17 Runtime error 178 ms 32484 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 35 ms 2844 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 276 ms 14080 KB Output isn't correct
2 Halted 0 ms 0 KB -