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Submission #1082193

# Submission time Handle Problem Language Result Execution time Memory
1082193 2024-08-30T20:17:36 Z serifefedartar Izbori (COCI22_izbori) C++17
40 / 110
 3000 ms 26640 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
 
#define fast ios::sync_with_stdio(0);cin.tie(0)
typedef long long ll;
#define f first
#define s second
#define LOGN 21
const ll MOD = 1e9 + 7;
const ll MAXN = 2e5 + 100;

#define int long long

vector<int> A, cc, occ[MAXN];

signed main() {
    fast;
    int n;
    cin >> n;

    A = vector<int>(n+1);
    for (int i = 1; i <= n; i++) {
        cin >> A[i];
        cc.push_back(A[i]);
    }
    sort(cc.begin(), cc.end());
    cc.erase(unique(cc.begin(), cc.end()), cc.end());
    int N = cc.size();

    for (int i = 1; i <= n; i++) {
        A[i] = upper_bound(cc.begin(), cc.end(), A[i]) - cc.begin();
        occ[A[i]].push_back(i);
    }

    int cnt = 0;
    for (int i = 1; i <= N; i++) {
        if (occ[i].size() <= 2000) {
            for (int a = 0; a < occ[i].size(); a++) {
                for (int b = a; b < occ[i].size(); b++) {
                    int positive = b - a + 1;
                    int now = - (occ[i][b] - occ[i][a] + 1) + 2 * positive - 1;

                    if (now < 0)
                        continue;

                    int left = (a == 0 ? occ[i][a] - 1 : occ[i][a] - occ[i][a-1] - 1);
                    int right = (b + 1 == occ[i].size() ? n - occ[i][b] : occ[i][b+1] - occ[i][b] - 1);

                    left = min(left, now);
                    right = min(right, now);

                    if (left > right)
                        swap(left, right);

                    if (left + right <= now)
                        cnt += (left + 1) * (right + 1);
                    else {
                        cnt += (right + 1) * (right + 2) / 2 + (now - right) * (right + 1);
                        cnt -= (now - left) * (now - left + 1) / 2;
                    }

                }
            }

        } else {
            vector<int> B(n+1);
            for (int j = 1; j <= n; j++)
                B[j] = B[j-1] + (A[j] == i ? 1 : -1);

            tree<pair<int,int>, null_type, less<pair<int,int>>, rb_tree_tag, tree_order_statistics_node_update> os;
            os.insert({0, 0});

            for (int j = 1; j <= n; j++) {
                cnt += os.order_of_key({B[j], 0});
                os.insert({B[j], j});
            }
        }
    }
    cout << cnt << "\n";
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:40:31: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |             for (int a = 0; a < occ[i].size(); a++) {
      |                             ~~^~~~~~~~~~~~~~~
Main.cpp:41:35: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |                 for (int b = a; b < occ[i].size(); b++) {
      |                                 ~~^~~~~~~~~~~~~~~
Main.cpp:49:40: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |                     int right = (b + 1 == occ[i].size() ? n - occ[i][b] : occ[i][b+1] - occ[i][b] - 1);
      |                                  ~~~~~~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4952 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 1 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 2 ms 5208 KB Output is correct
15 Correct 2 ms 5212 KB Output is correct
16 Correct 1 ms 5212 KB Output is correct
17 Correct 6 ms 5208 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 89 ms 18124 KB Output is correct
2 Correct 108 ms 21704 KB Output is correct
3 Correct 63 ms 14828 KB Output is correct
4 Correct 112 ms 22840 KB Output is correct
5 Correct 121 ms 23496 KB Output is correct
6 Correct 131 ms 24328 KB Output is correct
7 Correct 124 ms 24264 KB Output is correct
8 Correct 129 ms 24268 KB Output is correct
9 Correct 127 ms 24440 KB Output is correct
10 Correct 124 ms 24520 KB Output is correct
11 Correct 168 ms 24140 KB Output is correct

Subtask #4
0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4952 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 1 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 2 ms 5208 KB Output is correct
15 Correct 2 ms 5212 KB Output is correct
16 Correct 1 ms 5212 KB Output is correct
17 Correct 6 ms 5208 KB Output is correct
18 Correct 89 ms 18124 KB Output is correct
19 Correct 108 ms 21704 KB Output is correct
20 Correct 63 ms 14828 KB Output is correct
21 Correct 112 ms 22840 KB Output is correct
22 Correct 121 ms 23496 KB Output is correct
23 Correct 131 ms 24328 KB Output is correct
24 Correct 124 ms 24264 KB Output is correct
25 Correct 129 ms 24268 KB Output is correct
26 Correct 127 ms 24440 KB Output is correct
27 Correct 124 ms 24520 KB Output is correct
28 Correct 168 ms 24140 KB Output is correct
29 Correct 167 ms 25904 KB Output is correct
30 Correct 12 ms 6872 KB Output is correct
31 Correct 23 ms 8664 KB Output is correct
32 Correct 58 ms 13248 KB Output is correct
33 Correct 26 ms 8876 KB Output is correct
34 Correct 26 ms 9232 KB Output is correct
35 Correct 17 ms 7900 KB Output is correct
36 Correct 13 ms 6872 KB Output is correct
37 Correct 12 ms 7200 KB Output is correct
38 Correct 252 ms 24520 KB Output is correct
39 Correct 255 ms 24544 KB Output is correct
40 Correct 264 ms 24520 KB Output is correct
41 Correct 251 ms 24752 KB Output is correct
42 Correct 252 ms 24532 KB Output is correct
43 Correct 508 ms 26380 KB Output is correct
44 Correct 521 ms 26640 KB Output is correct
45 Correct 506 ms 26328 KB Output is correct
46 Correct 506 ms 26568 KB Output is correct
47 Correct 503 ms 26436 KB Output is correct
48 Correct 87 ms 10964 KB Output is correct
49 Correct 88 ms 10952 KB Output is correct
50 Execution timed out 3069 ms 25036 KB Time limit exceeded
51 Halted 0 ms 0 KB -