1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
///MEMENTO MEMO, MEMENTO LONG LONG
#include <bits/stdc++.h>

#define DEBUG if(0)
#define COUT cout << "\e[36m"
#define ENDL "\e[39m" << endl
#define VAR(v) " [\e[32m" << #v << "\e[36m=\e[91m" << v << "\e[36m] "

using namespace std;

typedef long long LL;
int n;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    vector<int> nums(n);
    for (int i = 0; i < n; ++i)
    {
        cin >> nums[i];
    }
    LL poss = 1;

    int left_out = 0, right_out = 0;
    for (int cut = 1; cut <= n - 1; ++cut)
    {
        int min_preserve = (n + (cut + 1)) / 2;
        while (left_out < cut && nums[left_out] < min_preserve)
        {
            left_out++;
        }
        while (right_out < cut && nums[n - 1 - right_out] < min_preserve)
        {
            right_out++;
        }
        DEBUG COUT << VAR(cut) << max(0, left_out + right_out - cut + 1) << VAR(left_out) << VAR(right_out) <<  VAR(min_preserve) << ENDL;
        poss += max(0, left_out + right_out - cut + 1);
    }

    cout << n+1+n << " " << poss << "\n";
}