/*
Zadanie: Ranking sklepów internetowych
Autor: Tomasz Kwiatkowski
*/
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
using namespace std;
typedef long long ll;
const int MAXN = 1000*1000 + 7;
const int INF = 1000*1000*1000 + 7;
int good(int minn, int maxx, int d, int n)
{
if (d > n)
return 0;
int left = max(0, maxx - d + 1);
int right = min(n - 1, minn + d - 1);
return max(0, right - left + 2 - d);
}
int main()
{
ios_base::sync_with_stdio(0), cin.tie(0);
int n;
cin >> n;
vector<pair<int, int>> rating(n);
for (int i = 0; i < n; ++i) {
cin >> rating[i].fi;
rating[i].se = i;
}
sort(rating.rbegin(), rating.rend());
ll ans = 0;
int minn = n;
int maxx = -1;
int d = 0;
for (auto [val, ind] : rating) {
minn = min(ind, minn);
maxx = max(ind, maxx);
ans += good(minn, maxx, d, n);
ans += good(minn, maxx, d + 1, n);
d += 2;
if (d > n)
break;
}
cout << 2*n + 1 << ' ' << ans << '\n';
return 0;
}
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 | /* Zadanie: Ranking sklepów internetowych Autor: Tomasz Kwiatkowski */ #include <bits/stdc++.h> #define fi first #define se second #define pb push_back using namespace std; typedef long long ll; const int MAXN = 1000*1000 + 7; const int INF = 1000*1000*1000 + 7; int good(int minn, int maxx, int d, int n) { if (d > n) return 0; int left = max(0, maxx - d + 1); int right = min(n - 1, minn + d - 1); return max(0, right - left + 2 - d); } int main() { ios_base::sync_with_stdio(0), cin.tie(0); int n; cin >> n; vector<pair<int, int>> rating(n); for (int i = 0; i < n; ++i) { cin >> rating[i].fi; rating[i].se = i; } sort(rating.rbegin(), rating.rend()); ll ans = 0; int minn = n; int maxx = -1; int d = 0; for (auto [val, ind] : rating) { minn = min(ind, minn); maxx = max(ind, maxx); ans += good(minn, maxx, d, n); ans += good(minn, maxx, d + 1, n); d += 2; if (d > n) break; } cout << 2*n + 1 << ' ' << ans << '\n'; return 0; } |
English