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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
#include <bits/stdc++.h>
using namespace std;
#define PII pair<int, int>
#define VI vector<int>
#define VPII vector<PII>
#define LL long long
#define LD long double
#define f first
#define s second
#define MP make_pair
#define PB push_back
#define endl '\n'
#define ALL(c) (c).begin(), (c).end()
#define SIZ(c) (int)(c).size()
#define REP(i, n) for(int i = 0; i < (int)(n); ++i)
#define FOR(i, b, e) for(int i = (b); i <= (int)(e); ++i)
#define FORD(i, b, e) for(int i = (b); i >= (int)(e); --i)
 
#define sim template<class n
sim, class s> ostream & operator << (ostream &p, pair<n, s> x)
{return p << "<" << x.f << ", " << x.s << ">";}
sim> auto operator << (ostream &p, n y) ->
typename enable_if<!is_same<n, string>::value, decltype(y.begin(), p)>::type 
{int o = 0; p << "{"; for(auto c: y) {if(o++) p << ", "; p << c;} return p << "}";}
void dor() {cerr << endl;}
sim, class...s> void dor(n p, s...y) {cerr << p << " "; dor(y...);}
sim, class s> void mini(n &p, s y) {if(p>y) p = y;}
sim, class s> void maxi(n &p, s y) {if(p<y) p = y;}
// #ifdef DEB
#define debug(...) dor(__FUNCTION__, ":", __LINE__, ": ", __VA_ARGS__)
// #else
// #define debug(...)
// #endif 
 
#define I(x) #x " =", (x), " "
#define A(a, i) #a "[" #i " =", i, "] =", a[i], " "

using namespace std;

const int MXN = 1e6+5;
int in[MXN];
int pos[MXN];
int n;

LL solve()
    {
    FOR(i, 1, n)
        {
        pos[in[i]] = i;
        }
    LL res = 0;
    int poc = pos[n];
    int kon = pos[n];
    int added = 1;
    FORD(i, n, 1)
        {
        if((n - i) % 2 == 1)
            {
            mini(poc, pos[n - added]);
            maxi(kon, pos[n - added]);
            added++;
            }
        int left = poc - 1;
        int right = n - kon;

        int extra = n - i + 1 - (kon - poc + 1);
        if(extra < 0)continue;
        mini(left, extra);
        mini(right, extra);
        int add = left + right - extra + 1;
        res += max(0, add);
        }
    return res;
    }

int32_t main()
    {
    cin >> n;
    FOR(i, 1, n)cin >> in[i];
    ios_base::sync_with_stdio(0);
    cout << 2 * n + 1 << " " << solve() << endl;
    }