oj.uz

Submission #971377

# Submission time Handle Problem Language Result Execution time Memory
971377 2024-04-28T12:19:12 Z RandomUser Izbori (COCI22_izbori) C++17
40 / 110
 3000 ms 4824 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")

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

    BIT(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; }
};

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

    int n;
    ll ans = 0;
    cin >> n;
    int B = sqrt(n);

    vector<int> v(n+1), comp;
    map<int, int> cnt;
    for(int i=1; i<=n; i++) {
        cin >> v[i];
        if(++cnt[v[i]] == 1) comp.push_back(v[i]);
    }

    BIT bit(3*n);
    for(int &x : comp) {
        if(cnt[x] >= 500) {
            int sum = 0;
            bit.update(n+1, 1);
            for(int i=1; i<=n; i++) {
                sum += (v[i] == x);
                ans += bit.query(2*sum - i - 1 + (n + 1));
                bit.update(2*sum - i + (n + 1), 1);
            }
            bit.reset();
        } else {
            ans += cnt[x];

            vector<int> p; p.push_back(0);
            for(int i=1; i<=n; i++)
                if(v[i] == x) p.push_back(i);
            p.push_back(n+1);

            for(int i=1; i<p.size()-1; i++) {
                for(int j=i+1; j<p.size()-1; j++) {
                    if(2 * (j - i + 1) <= p[j] - p[i] + 1) continue;
                    int left = 2 * (j - i + 1) - (p[j] - p[i] + 1) - 1;
                    int L = p[i] - p[i-1] - 1;
                    int R = p[j+1] - p[j] - 1;
                    for(int k=0; k<=min(L,left); k++) ans += min(R, left - k) + 1;

                }
            }
        }
    }

    cout << ans << '\n';
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:68:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |             for(int i=1; i<p.size()-1; i++) {
      |                          ~^~~~~~~~~~~
Main.cpp:69:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |                 for(int j=i+1; j<p.size()-1; j++) {
      |                                ~^~~~~~~~~~~
Main.cpp:40:9: warning: unused variable 'B' [-Wunused-variable]
   40 |     int B = sqrt(n);
      |         ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 2552 KB Output is correct
2 Correct 17 ms 2940 KB Output is correct
3 Correct 10 ms 1884 KB Output is correct
4 Correct 21 ms 3164 KB Output is correct
5 Correct 20 ms 3428 KB Output is correct
6 Correct 22 ms 3416 KB Output is correct
7 Correct 22 ms 3420 KB Output is correct
8 Correct 22 ms 3596 KB Output is correct
9 Correct 23 ms 3416 KB Output is correct
10 Correct 25 ms 3416 KB Output is correct
11 Correct 14 ms 3420 KB Output is correct

Subtask #4
0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 14 ms 2552 KB Output is correct
19 Correct 17 ms 2940 KB Output is correct
20 Correct 10 ms 1884 KB Output is correct
21 Correct 21 ms 3164 KB Output is correct
22 Correct 20 ms 3428 KB Output is correct
23 Correct 22 ms 3416 KB Output is correct
24 Correct 22 ms 3420 KB Output is correct
25 Correct 22 ms 3596 KB Output is correct
26 Correct 23 ms 3416 KB Output is correct
27 Correct 25 ms 3416 KB Output is correct
28 Correct 14 ms 3420 KB Output is correct
29 Correct 25 ms 3412 KB Output is correct
30 Correct 848 ms 3024 KB Output is correct
31 Execution timed out 3058 ms 4824 KB Time limit exceeded
32 Halted 0 ms 0 KB -