oj.uz

Submission #968672

# Submission time Handle Problem Language Result Execution time Memory
968672 2024-04-23T20:01:27 Z RandomUser Index (COCI21_index) C++17
110 / 110
 583 ms 154688 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;

struct BIT {
    int n;
    vector<int> tree;

    void config(int _n) {
        n = _n + 10;
        tree.resize(_n+60);
    }

    void update(int p, int v) {
        for(p++; p<n; p+=p&-p) tree[p] += v;
    }

    int query(int p) {
        int ans = 0;
        for(p++; p>0; p-=p&-p) ans += tree[p];
        return ans;
    }

    int query(int l, int r) { return query(r) - query(l-1); }
    void reset() { for(int &x : tree) x = 0; }
};

stack<int> to_change[200005];
vector<int> v[200005];

int32_t main() {
    ios_base::sync_with_stdio(false);
    cout.tie(0); cin.tie(0);

    int n, q;
    cin >> n >> q;

    vector<int> L(q), R(q, 2e5), ANS(q, 1);

    for(int i=1; i<=n; i++) {
        int x;
        cin >> x;
        v[x].push_back(i);
    }

    vector<pii> qus(q);
    for(pii &x : qus) cin >> x.first >> x.second;

    bool changed = 1;
    BIT bit; bit.config(2e5);
    while(changed) {
        changed = 0;

        for(int i=0; i<q; i++)
            if(L[i] <= R[i]) to_change[(L[i] + R[i]) / 2].push(i);

        for(int i=2e5; i>=1; i--) {
            for(int &x : v[i]) bit.update(x, 1);
            while(!to_change[i].empty()) {
                changed = 1;
                int id = to_change[i].top();
                to_change[i].pop();
                if(bit.query(qus[id].first, qus[id].second) >= i) ANS[id] = i, L[id] = i + 1;
                else R[id] = i - 1;
            }
        }

        bit.reset();
    }

    for(int &x : ANS) cout << x << '\n';
    return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 140624 KB Output is correct
2 Correct 105 ms 140564 KB Output is correct
3 Correct 99 ms 140620 KB Output is correct
4 Correct 105 ms 140620 KB Output is correct
5 Correct 103 ms 140448 KB Output is correct
6 Correct 103 ms 140628 KB Output is correct
7 Correct 109 ms 140700 KB Output is correct
8 Correct 106 ms 140436 KB Output is correct
9 Correct 99 ms 140624 KB Output is correct
10 Correct 104 ms 140428 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 140624 KB Output is correct
2 Correct 105 ms 140564 KB Output is correct
3 Correct 99 ms 140620 KB Output is correct
4 Correct 105 ms 140620 KB Output is correct
5 Correct 103 ms 140448 KB Output is correct
6 Correct 103 ms 140628 KB Output is correct
7 Correct 109 ms 140700 KB Output is correct
8 Correct 106 ms 140436 KB Output is correct
9 Correct 99 ms 140624 KB Output is correct
10 Correct 104 ms 140428 KB Output is correct
11 Correct 205 ms 143904 KB Output is correct
12 Correct 189 ms 143884 KB Output is correct
13 Correct 178 ms 143924 KB Output is correct
14 Correct 178 ms 143692 KB Output is correct
15 Correct 193 ms 143840 KB Output is correct
16 Correct 185 ms 143864 KB Output is correct
17 Correct 186 ms 143892 KB Output is correct
18 Correct 208 ms 143888 KB Output is correct
19 Correct 197 ms 143700 KB Output is correct
20 Correct 182 ms 143700 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 140624 KB Output is correct
2 Correct 105 ms 140564 KB Output is correct
3 Correct 99 ms 140620 KB Output is correct
4 Correct 105 ms 140620 KB Output is correct
5 Correct 103 ms 140448 KB Output is correct
6 Correct 103 ms 140628 KB Output is correct
7 Correct 109 ms 140700 KB Output is correct
8 Correct 106 ms 140436 KB Output is correct
9 Correct 99 ms 140624 KB Output is correct
10 Correct 104 ms 140428 KB Output is correct
11 Correct 205 ms 143904 KB Output is correct
12 Correct 189 ms 143884 KB Output is correct
13 Correct 178 ms 143924 KB Output is correct
14 Correct 178 ms 143692 KB Output is correct
15 Correct 193 ms 143840 KB Output is correct
16 Correct 185 ms 143864 KB Output is correct
17 Correct 186 ms 143892 KB Output is correct
18 Correct 208 ms 143888 KB Output is correct
19 Correct 197 ms 143700 KB Output is correct
20 Correct 182 ms 143700 KB Output is correct
21 Correct 539 ms 154268 KB Output is correct
22 Correct 522 ms 154368 KB Output is correct
23 Correct 543 ms 154276 KB Output is correct
24 Correct 535 ms 154688 KB Output is correct
25 Correct 541 ms 154260 KB Output is correct
26 Correct 566 ms 154420 KB Output is correct
27 Correct 550 ms 154340 KB Output is correct
28 Correct 560 ms 154396 KB Output is correct
29 Correct 583 ms 154244 KB Output is correct
30 Correct 567 ms 154264 KB Output is correct