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Submission #556572

# Submission time Handle Problem Language Result Execution time Memory
556572 2022-05-03T11:27:45 Z eecs Izbori (COCI22_izbori) C++17
110 / 110
 2574 ms 15492 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() <= 500) {
            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 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 312 KB Output is correct
5 Correct 1 ms 308 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 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 312 KB Output is correct
5 Correct 1 ms 308 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 3 ms 340 KB Output is correct
12 Correct 3 ms 320 KB Output is correct
13 Correct 2 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 3 ms 340 KB Output is correct
17 Correct 2 ms 2632 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 4064 KB Output is correct
2 Correct 33 ms 4384 KB Output is correct
3 Correct 17 ms 3712 KB Output is correct
4 Correct 31 ms 4464 KB Output is correct
5 Correct 30 ms 4568 KB Output is correct
6 Correct 33 ms 4820 KB Output is correct
7 Correct 32 ms 4792 KB Output is correct
8 Correct 35 ms 4784 KB Output is correct
9 Correct 37 ms 4796 KB Output is correct
10 Correct 42 ms 4644 KB Output is correct
11 Correct 27 ms 4736 KB Output is correct

Subtask #4
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 312 KB Output is correct
5 Correct 1 ms 308 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 3 ms 340 KB Output is correct
12 Correct 3 ms 320 KB Output is correct
13 Correct 2 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 3 ms 340 KB Output is correct
17 Correct 2 ms 2632 KB Output is correct
18 Correct 24 ms 4064 KB Output is correct
19 Correct 33 ms 4384 KB Output is correct
20 Correct 17 ms 3712 KB Output is correct
21 Correct 31 ms 4464 KB Output is correct
22 Correct 30 ms 4568 KB Output is correct
23 Correct 33 ms 4820 KB Output is correct
24 Correct 32 ms 4792 KB Output is correct
25 Correct 35 ms 4784 KB Output is correct
26 Correct 37 ms 4796 KB Output is correct
27 Correct 42 ms 4644 KB Output is correct
28 Correct 27 ms 4736 KB Output is correct
29 Correct 37 ms 6208 KB Output is correct
30 Correct 19 ms 4400 KB Output is correct
31 Correct 42 ms 7956 KB Output is correct
32 Correct 147 ms 15492 KB Output is correct
33 Correct 62 ms 8380 KB Output is correct
34 Correct 49 ms 8708 KB Output is correct
35 Correct 28 ms 6100 KB Output is correct
36 Correct 17 ms 3964 KB Output is correct
37 Correct 20 ms 4664 KB Output is correct
38 Correct 52 ms 4980 KB Output is correct
39 Correct 57 ms 4668 KB Output is correct
40 Correct 54 ms 4808 KB Output is correct
41 Correct 59 ms 4748 KB Output is correct
42 Correct 65 ms 4936 KB Output is correct
43 Correct 105 ms 6708 KB Output is correct
44 Correct 102 ms 6556 KB Output is correct
45 Correct 106 ms 6640 KB Output is correct
46 Correct 105 ms 6580 KB Output is correct
47 Correct 101 ms 6692 KB Output is correct
48 Correct 1442 ms 5176 KB Output is correct
49 Correct 1456 ms 5180 KB Output is correct
50 Correct 609 ms 5600 KB Output is correct
51 Correct 619 ms 5388 KB Output is correct
52 Correct 424 ms 2780 KB Output is correct
53 Correct 2574 ms 5020 KB Output is correct
54 Correct 1443 ms 5060 KB Output is correct