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Submission #556573

# Submission time Handle Problem Language Result Execution time Memory
556573 2022-05-03T11:28:43 Z eecs Izbori (COCI22_izbori) C++17
110 / 110
 2945 ms 14424 KB 
#include <bits/stdc++.h>
using namespace std;

const int maxn = 200010;
int n, a[maxn], sum[maxn], c[maxn * 2];
long long ans;
map<int, vector<int>> mp;

void add(int p) {
    for (p += maxn; p < maxn * 2; p += p & -p) c[p]++;
}

int query(int p) {
    int s = 0;
    for (p += maxn; p; p -= p & -p) s += c[p];
    return s;
}

int main() {
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &a[i]), mp[a[i]].push_back(i);
    }
    auto calc = [&](int x, int y, int lim) {
        int t = min(x, max(0, y - lim));
        return (2LL * lim + t + 1) * t / 2 + 1LL * (x - t) * y;
    };
    for (auto &p : mp) {
        auto &pos = p.second;
        if (pos.size() <= 400) {
            for (int i = 0; i < pos.size(); i++) {
                for (int j = i; j < pos.size(); j++) {
                    int l = (i ? pos[i - 1] : 0) + 1;
                    int r = (j + 1 < pos.size() ? pos[j + 1] : n + 1) - 1;
                    int lim = 2 * (j - i);
                    ans += calc(pos[i], r, lim) + calc(l - 1, pos[j] - 1, lim);
                    ans -= calc(l - 1, r, lim) + calc(pos[i], pos[j] - 1, lim);
                }
            }
        } else {
            memset(sum, -1, sizeof(sum));
            for (int x : pos) {
                sum[x] = 1;
            }
            for (int i = 1; i <= n; i++) {
                sum[i] += sum[i - 1];
            }
            memset(c, 0, sizeof(c));
            for (int i = 1; i <= n; i++) {
                add(sum[i - 1]), ans += query(sum[i] - 1);
            }
        }
    }
    printf("%lld\n", ans);
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:31:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |             for (int i = 0; i < pos.size(); i++) {
      |                             ~~^~~~~~~~~~~~
Main.cpp:32:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |                 for (int j = i; j < pos.size(); j++) {
      |                                 ~~^~~~~~~~~~~~
Main.cpp:34:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |                     int r = (j + 1 < pos.size() ? pos[j + 1] : n + 1) - 1;
      |                              ~~~~~~^~~~~~~~~~~~
Main.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
Main.cpp:22:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         scanf("%d", &a[i]), mp[a[i]].push_back(i);
      |         ~~~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 3 ms 340 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 2 ms 340 KB Output is correct
13 Correct 3 ms 340 KB Output is correct
14 Correct 3 ms 340 KB Output is correct
15 Correct 3 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 2 ms 2644 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 3752 KB Output is correct
2 Correct 31 ms 4112 KB Output is correct
3 Correct 17 ms 3596 KB Output is correct
4 Correct 32 ms 4208 KB Output is correct
5 Correct 35 ms 4188 KB Output is correct
6 Correct 36 ms 4432 KB Output is correct
7 Correct 46 ms 4316 KB Output is correct
8 Correct 35 ms 4424 KB Output is correct
9 Correct 32 ms 4424 KB Output is correct
10 Correct 34 ms 4344 KB Output is correct
11 Correct 25 ms 4336 KB Output is correct

Subtask #4
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 3 ms 340 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 2 ms 340 KB Output is correct
13 Correct 3 ms 340 KB Output is correct
14 Correct 3 ms 340 KB Output is correct
15 Correct 3 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 2 ms 2644 KB Output is correct
18 Correct 22 ms 3752 KB Output is correct
19 Correct 31 ms 4112 KB Output is correct
20 Correct 17 ms 3596 KB Output is correct
21 Correct 32 ms 4208 KB Output is correct
22 Correct 35 ms 4188 KB Output is correct
23 Correct 36 ms 4432 KB Output is correct
24 Correct 46 ms 4316 KB Output is correct
25 Correct 35 ms 4424 KB Output is correct
26 Correct 32 ms 4424 KB Output is correct
27 Correct 34 ms 4344 KB Output is correct
28 Correct 25 ms 4336 KB Output is correct
29 Correct 34 ms 4332 KB Output is correct
30 Correct 20 ms 4240 KB Output is correct
31 Correct 67 ms 7588 KB Output is correct
32 Correct 179 ms 14424 KB Output is correct
33 Correct 48 ms 7852 KB Output is correct
34 Correct 54 ms 8172 KB Output is correct
35 Correct 35 ms 5744 KB Output is correct
36 Correct 15 ms 3720 KB Output is correct
37 Correct 20 ms 4436 KB Output is correct
38 Correct 68 ms 4548 KB Output is correct
39 Correct 60 ms 4288 KB Output is correct
40 Correct 53 ms 4484 KB Output is correct
41 Correct 53 ms 4256 KB Output is correct
42 Correct 58 ms 4548 KB Output is correct
43 Correct 105 ms 4816 KB Output is correct
44 Correct 120 ms 4540 KB Output is correct
45 Correct 112 ms 4672 KB Output is correct
46 Correct 101 ms 4600 KB Output is correct
47 Correct 109 ms 4636 KB Output is correct
48 Correct 1554 ms 4488 KB Output is correct
49 Correct 1526 ms 4488 KB Output is correct
50 Correct 660 ms 5036 KB Output is correct
51 Correct 645 ms 4888 KB Output is correct
52 Correct 2945 ms 4372 KB Output is correct
53 Correct 2740 ms 4284 KB Output is correct
54 Correct 1534 ms 4424 KB Output is correct