oj.uz

Submission #972254

# Submission time Handle Problem Language Result Execution time Memory
972254 2024-04-30T10:04:27 Z RandomUser Izbori (COCI22_izbori) C++17
40 / 110
 3000 ms 10592 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#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] >= B) {
            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 = min(left, p[i] - p[i-1] - 1);
                    int R = p[j+1] - p[j] - 1;
                    //for(int k=0; k<=L; k++) ans += min(R, left - k);
                    ans += L + 1;

                    if(left < R) {
                        ans += 1ll * left * (left + 1) / 2;
                    } else {
                        ans += R * (left - R + 1);
                        ans += 1ll * (R - 1) * R / 2;
                    }
                }
            }
        }
    }

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

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:66:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |             for(int i=1; i<p.size()-1; i++) {
      |                          ~^~~~~~~~~~~
Main.cpp:67:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |                 for(int j=i+1; j<p.size()-1; j++) {
      |                                ~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 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 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 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 504 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 356 KB Output is correct
13 Correct 1 ms 416 KB Output is correct
14 Correct 1 ms 348 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 348 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 2396 KB Output is correct
2 Correct 17 ms 3192 KB Output is correct
3 Correct 11 ms 1884 KB Output is correct
4 Correct 19 ms 3276 KB Output is correct
5 Correct 19 ms 3416 KB Output is correct
6 Correct 25 ms 3416 KB Output is correct
7 Correct 21 ms 3420 KB Output is correct
8 Correct 21 ms 3416 KB Output is correct
9 Correct 20 ms 3420 KB Output is correct
10 Correct 20 ms 3420 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 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 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 504 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 356 KB Output is correct
13 Correct 1 ms 416 KB Output is correct
14 Correct 1 ms 348 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 348 KB Output is correct
18 Correct 12 ms 2396 KB Output is correct
19 Correct 17 ms 3192 KB Output is correct
20 Correct 11 ms 1884 KB Output is correct
21 Correct 19 ms 3276 KB Output is correct
22 Correct 19 ms 3416 KB Output is correct
23 Correct 25 ms 3416 KB Output is correct
24 Correct 21 ms 3420 KB Output is correct
25 Correct 21 ms 3416 KB Output is correct
26 Correct 20 ms 3420 KB Output is correct
27 Correct 20 ms 3420 KB Output is correct
28 Correct 14 ms 3420 KB Output is correct
29 Correct 20 ms 3420 KB Output is correct
30 Correct 815 ms 2816 KB Output is correct
31 Correct 2994 ms 5376 KB Output is correct
32 Execution timed out 3030 ms 10592 KB Time limit exceeded
33 Halted 0 ms 0 KB -