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Submission #556575

# Submission time Handle Problem Language Result Execution time Memory
556575 2022-05-03T11:30:08 Z eecs Izbori (COCI22_izbori) C++17
110 / 110
 848 ms 14420 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() <= 1000) {
            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 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 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 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 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 2 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 3 ms 336 KB Output is correct
15 Correct 2 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 24 ms 3780 KB Output is correct
2 Correct 28 ms 4012 KB Output is correct
3 Correct 17 ms 3576 KB Output is correct
4 Correct 31 ms 4132 KB Output is correct
5 Correct 32 ms 4212 KB Output is correct
6 Correct 34 ms 4352 KB Output is correct
7 Correct 33 ms 4408 KB Output is correct
8 Correct 32 ms 4404 KB Output is correct
9 Correct 33 ms 4368 KB Output is correct
10 Correct 33 ms 4272 KB Output is correct
11 Correct 27 ms 4244 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 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 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 2 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 3 ms 336 KB Output is correct
15 Correct 2 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 24 ms 3780 KB Output is correct
19 Correct 28 ms 4012 KB Output is correct
20 Correct 17 ms 3576 KB Output is correct
21 Correct 31 ms 4132 KB Output is correct
22 Correct 32 ms 4212 KB Output is correct
23 Correct 34 ms 4352 KB Output is correct
24 Correct 33 ms 4408 KB Output is correct
25 Correct 32 ms 4404 KB Output is correct
26 Correct 33 ms 4368 KB Output is correct
27 Correct 33 ms 4272 KB Output is correct
28 Correct 27 ms 4244 KB Output is correct
29 Correct 38 ms 4312 KB Output is correct
30 Correct 18 ms 4180 KB Output is correct
31 Correct 43 ms 7568 KB Output is correct
32 Correct 169 ms 14420 KB Output is correct
33 Correct 49 ms 7896 KB Output is correct
34 Correct 59 ms 8188 KB Output is correct
35 Correct 29 ms 5732 KB Output is correct
36 Correct 17 ms 3724 KB Output is correct
37 Correct 20 ms 4408 KB Output is correct
38 Correct 57 ms 4556 KB Output is correct
39 Correct 56 ms 4332 KB Output is correct
40 Correct 53 ms 4400 KB Output is correct
41 Correct 56 ms 4332 KB Output is correct
42 Correct 53 ms 4560 KB Output is correct
43 Correct 100 ms 4644 KB Output is correct
44 Correct 103 ms 4564 KB Output is correct
45 Correct 103 ms 4652 KB Output is correct
46 Correct 101 ms 4568 KB Output is correct
47 Correct 102 ms 4720 KB Output is correct
48 Correct 848 ms 4444 KB Output is correct
49 Correct 829 ms 4452 KB Output is correct
50 Correct 600 ms 5032 KB Output is correct
51 Correct 604 ms 4892 KB Output is correct
52 Correct 446 ms 2132 KB Output is correct
53 Correct 482 ms 1996 KB Output is correct
54 Correct 822 ms 2036 KB Output is correct