oj.uz

Submission #752774

# Submission time Handle Problem Language Result Execution time Memory
752774 2023-06-03T20:35:35 Z math_rabbit_1028 Abracadabra (CEOI22_abracadabra) C++14
0 / 100
 338 ms 34324 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[qnum].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++;
        }

        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--) {
                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 268 ms 14076 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 312 ms 28164 KB Output is correct
2 Correct 338 ms 34324 KB Output is correct
3 Correct 274 ms 25908 KB Output is correct
4 Correct 250 ms 22244 KB Output is correct
5 Correct 270 ms 23616 KB Output is correct
6 Correct 244 ms 21072 KB Output is correct
7 Correct 290 ms 26204 KB Output is correct
8 Correct 281 ms 25484 KB Output is correct
9 Correct 297 ms 22760 KB Output is correct
10 Correct 273 ms 24012 KB Output is correct
11 Correct 235 ms 20376 KB Output is correct
12 Correct 235 ms 20012 KB Output is correct
13 Correct 257 ms 23888 KB Output is correct
14 Correct 245 ms 20460 KB Output is correct
15 Correct 291 ms 24392 KB Output is correct
16 Correct 18 ms 2680 KB Output is correct
17 Runtime error 177 ms 32460 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 37 ms 2808 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 268 ms 14076 KB Output isn't correct
2 Halted 0 ms 0 KB -