oj.uz

Submission #968421

# Submission time Handle Problem Language Result Execution time Memory
968421 2024-04-23T12:08:36 Z VMaksimoski008 Index (COCI21_index) C++14
110 / 110
 1601 ms 13612 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,bmi,bmi2,lzcnt,popcnt")

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

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

    vector<int> v(n+1);
    for(int i=1; i<=n; i++) cin >> v[i];

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

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

    while(changed) {
        changed = 0;

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

        for(auto &[mid, st] : to_change) {
            vector<int> pref(n+1);
            for(int i=1; i<=n; i++) pref[i] = pref[i-1] + (v[i] >= mid);

            while(!st.empty()) {
                changed = 1;
                int id = st.top();
                st.pop();
                if(pref[qus[id].second] - pref[qus[id].first-1] >= mid) ANS[id] = mid, L[id] = mid + 1;
                else R[id] = mid - 1;
            }
        }
    }

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

Compilation message

index.cpp: In function 'int32_t main()':
index.cpp:32:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   32 |         for(auto &[mid, st] : to_change) {
      |                   ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 116 ms 3568 KB Output is correct
12 Correct 114 ms 3432 KB Output is correct
13 Correct 127 ms 3576 KB Output is correct
14 Correct 115 ms 3472 KB Output is correct
15 Correct 118 ms 3472 KB Output is correct
16 Correct 120 ms 3608 KB Output is correct
17 Correct 114 ms 3468 KB Output is correct
18 Correct 116 ms 3376 KB Output is correct
19 Correct 115 ms 3472 KB Output is correct
20 Correct 121 ms 3420 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 116 ms 3568 KB Output is correct
12 Correct 114 ms 3432 KB Output is correct
13 Correct 127 ms 3576 KB Output is correct
14 Correct 115 ms 3472 KB Output is correct
15 Correct 118 ms 3472 KB Output is correct
16 Correct 120 ms 3608 KB Output is correct
17 Correct 114 ms 3468 KB Output is correct
18 Correct 116 ms 3376 KB Output is correct
19 Correct 115 ms 3472 KB Output is correct
20 Correct 121 ms 3420 KB Output is correct
21 Correct 1501 ms 13380 KB Output is correct
22 Correct 1510 ms 13380 KB Output is correct
23 Correct 1601 ms 13400 KB Output is correct
24 Correct 1572 ms 13400 KB Output is correct
25 Correct 1526 ms 13432 KB Output is correct
26 Correct 1505 ms 13504 KB Output is correct
27 Correct 1502 ms 13356 KB Output is correct
28 Correct 1539 ms 13324 KB Output is correct
29 Correct 1516 ms 13612 KB Output is correct
30 Correct 1529 ms 13592 KB Output is correct