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Submission #1082196

# Submission time Handle Problem Language Result Execution time Memory
1082196 2024-08-30T20:21:26 Z serifefedartar Izbori (COCI22_izbori) C++17
110 / 110
 514 ms 25036 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() <= 3000) {
            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 4952 KB Output is correct
2 Correct 1 ms 4952 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 5164 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 4952 KB Output is correct
2 Correct 1 ms 4952 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 5164 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 2 ms 5212 KB Output is correct
11 Correct 2 ms 5212 KB Output is correct
12 Correct 2 ms 5212 KB Output is correct
13 Correct 2 ms 5212 KB Output is correct
14 Correct 2 ms 5212 KB Output is correct
15 Correct 2 ms 5212 KB Output is correct
16 Correct 2 ms 5212 KB Output is correct
17 Correct 8 ms 5212 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 18084 KB Output is correct
2 Correct 111 ms 21448 KB Output is correct
3 Correct 67 ms 14576 KB Output is correct
4 Correct 116 ms 22472 KB Output is correct
5 Correct 134 ms 23168 KB Output is correct
6 Correct 131 ms 23944 KB Output is correct
7 Correct 126 ms 23756 KB Output is correct
8 Correct 136 ms 23756 KB Output is correct
9 Correct 124 ms 24012 KB Output is correct
10 Correct 142 ms 24008 KB Output is correct
11 Correct 164 ms 23884 KB Output is correct

Subtask #4
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4952 KB Output is correct
2 Correct 1 ms 4952 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 5164 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 2 ms 5212 KB Output is correct
11 Correct 2 ms 5212 KB Output is correct
12 Correct 2 ms 5212 KB Output is correct
13 Correct 2 ms 5212 KB Output is correct
14 Correct 2 ms 5212 KB Output is correct
15 Correct 2 ms 5212 KB Output is correct
16 Correct 2 ms 5212 KB Output is correct
17 Correct 8 ms 5212 KB Output is correct
18 Correct 81 ms 18084 KB Output is correct
19 Correct 111 ms 21448 KB Output is correct
20 Correct 67 ms 14576 KB Output is correct
21 Correct 116 ms 22472 KB Output is correct
22 Correct 134 ms 23168 KB Output is correct
23 Correct 131 ms 23944 KB Output is correct
24 Correct 126 ms 23756 KB Output is correct
25 Correct 136 ms 23756 KB Output is correct
26 Correct 124 ms 24012 KB Output is correct
27 Correct 142 ms 24008 KB Output is correct
28 Correct 164 ms 23884 KB Output is correct
29 Correct 167 ms 23880 KB Output is correct
30 Correct 11 ms 6616 KB Output is correct
31 Correct 23 ms 8184 KB Output is correct
32 Correct 62 ms 12096 KB Output is correct
33 Correct 25 ms 8404 KB Output is correct
34 Correct 25 ms 8668 KB Output is correct
35 Correct 16 ms 7388 KB Output is correct
36 Correct 9 ms 6620 KB Output is correct
37 Correct 11 ms 6876 KB Output is correct
38 Correct 253 ms 24108 KB Output is correct
39 Correct 263 ms 24360 KB Output is correct
40 Correct 251 ms 24008 KB Output is correct
41 Correct 252 ms 24264 KB Output is correct
42 Correct 257 ms 24268 KB Output is correct
43 Correct 505 ms 24520 KB Output is correct
44 Correct 512 ms 24520 KB Output is correct
45 Correct 510 ms 24524 KB Output is correct
46 Correct 510 ms 24640 KB Output is correct
47 Correct 514 ms 24520 KB Output is correct
48 Correct 89 ms 10196 KB Output is correct
49 Correct 97 ms 10180 KB Output is correct
50 Correct 217 ms 24528 KB Output is correct
51 Correct 227 ms 25036 KB Output is correct
52 Correct 50 ms 10696 KB Output is correct
53 Correct 64 ms 10452 KB Output is correct
54 Correct 80 ms 10704 KB Output is correct