oj.uz

답안 #752773

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
752773 2023-06-03T20:33:39 Z math_rabbit_1028 Abracadabra (CEOI22_abracadabra) C++14
0 / 100
 371 ms 34212 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

# 결과 실행 시간 메모리 Grader output
1 Incorrect 300 ms 13996 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 341 ms 28180 KB Output is correct
2 Correct 371 ms 34212 KB Output is correct
3 Correct 302 ms 25832 KB Output is correct
4 Correct 258 ms 22184 KB Output is correct
5 Correct 282 ms 23636 KB Output is correct
6 Correct 262 ms 21136 KB Output is correct
7 Correct 312 ms 26104 KB Output is correct
8 Correct 305 ms 25388 KB Output is correct
9 Correct 264 ms 22768 KB Output is correct
10 Correct 275 ms 24004 KB Output is correct
11 Correct 234 ms 20276 KB Output is correct
12 Correct 259 ms 19944 KB Output is correct
13 Correct 273 ms 23972 KB Output is correct
14 Correct 245 ms 20428 KB Output is correct
15 Correct 296 ms 24440 KB Output is correct
16 Correct 18 ms 2644 KB Output is correct
17 Runtime error 185 ms 32524 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 35 ms 2880 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 300 ms 13996 KB Output isn't correct
2 Halted 0 ms 0 KB -