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Submission #1082195

# Submission time Handle Problem Language Result Execution time Memory
1082195 2024-08-30T20:19:31 Z serifefedartar Izbori (COCI22_izbori) C++17
40 / 110
 3000 ms 24524 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() <= 450) {
            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 4956 KB Output is correct
9 Correct 2 ms 5212 KB Output is correct
10 Correct 1 ms 5220 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 2 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 1 ms 5212 KB Output is correct
15 Correct 3 ms 5212 KB Output is correct
16 Correct 2 ms 5212 KB Output is correct
17 Correct 2 ms 5212 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 18124 KB Output is correct
2 Correct 110 ms 21496 KB Output is correct
3 Correct 62 ms 14508 KB Output is correct
4 Correct 119 ms 22484 KB Output is correct
5 Correct 119 ms 23152 KB Output is correct
6 Correct 129 ms 23756 KB Output is correct
7 Correct 127 ms 23800 KB Output is correct
8 Correct 128 ms 23756 KB Output is correct
9 Correct 124 ms 24012 KB Output is correct
10 Correct 124 ms 24104 KB Output is correct
11 Correct 165 ms 23884 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 4956 KB Output is correct
9 Correct 2 ms 5212 KB Output is correct
10 Correct 1 ms 5220 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 2 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 1 ms 5212 KB Output is correct
15 Correct 3 ms 5212 KB Output is correct
16 Correct 2 ms 5212 KB Output is correct
17 Correct 2 ms 5212 KB Output is correct
18 Correct 84 ms 18124 KB Output is correct
19 Correct 110 ms 21496 KB Output is correct
20 Correct 62 ms 14508 KB Output is correct
21 Correct 119 ms 22484 KB Output is correct
22 Correct 119 ms 23152 KB Output is correct
23 Correct 129 ms 23756 KB Output is correct
24 Correct 127 ms 23800 KB Output is correct
25 Correct 128 ms 23756 KB Output is correct
26 Correct 124 ms 24012 KB Output is correct
27 Correct 124 ms 24104 KB Output is correct
28 Correct 165 ms 23884 KB Output is correct
29 Correct 179 ms 23880 KB Output is correct
30 Correct 12 ms 6616 KB Output is correct
31 Correct 22 ms 8152 KB Output is correct
32 Correct 57 ms 11980 KB Output is correct
33 Correct 24 ms 8404 KB Output is correct
34 Correct 26 ms 8660 KB Output is correct
35 Correct 16 ms 7384 KB Output is correct
36 Correct 10 ms 6592 KB Output is correct
37 Correct 12 ms 6872 KB Output is correct
38 Correct 254 ms 24092 KB Output is correct
39 Correct 262 ms 24272 KB Output is correct
40 Correct 282 ms 24000 KB Output is correct
41 Correct 254 ms 24348 KB Output is correct
42 Correct 252 ms 24312 KB Output is correct
43 Correct 504 ms 24524 KB Output is correct
44 Correct 504 ms 24520 KB Output is correct
45 Correct 512 ms 24520 KB Output is correct
46 Correct 504 ms 24524 KB Output is correct
47 Correct 533 ms 24520 KB Output is correct
48 Execution timed out 3063 ms 24168 KB Time limit exceeded
49 Halted 0 ms 0 KB -