#include <bits/stdc++.h>
#define fi first
#define se second
#define p_b push_back
#define pll pair<ll,ll>
#define pii pair<int,int>
#define m_p make_pair
#define all(x) x.begin(),x.end()
#define sset ordered_set
#define sqr(x) (x)*(x)
#define pw(x) (1ll << (x))
#define sz(x) (int)x.size()
#define fout(x) {cout << x << "\n"; return; }
using namespace std;
typedef long long ll;
typedef long double ld;
const int MAXN = 1e5;
const int M = pw(16);
const long long mod = 1e9 + 7;
const int N = 5e5;
const ll inf = 1e18;
template <typename T> void vout(T s){cout << s << endl;exit(0);}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
vector <int> a(n), pos(n + 1);
int ans = 1 + 2 * n;
ll ans1 = 0;
int idx = 0;
for(int &i : a){
cin >> i;
pos[i] = ++idx;
}
int l, r;
l = r = pos[n];
ll uk = 1;
for(int len = 1; len <= n; len++){
while(len / 2 + 1 > uk){
l = min(l, pos[n - uk]);
r = max(r, pos[n - uk]);
uk++;
}
if(r - l + 1 <= len){
int le1, ri1;
ri1 = min(n - len + 1, l);
le1 = max(1, r - len + 1);
ans1 += ri1 - le1 + 1;
}
}
cout << ans << " " << ans1 << "\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 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | #include <bits/stdc++.h> #define fi first #define se second #define p_b push_back #define pll pair<ll,ll> #define pii pair<int,int> #define m_p make_pair #define all(x) x.begin(),x.end() #define sset ordered_set #define sqr(x) (x)*(x) #define pw(x) (1ll << (x)) #define sz(x) (int)x.size() #define fout(x) {cout << x << "\n"; return; } using namespace std; typedef long long ll; typedef long double ld; const int MAXN = 1e5; const int M = pw(16); const long long mod = 1e9 + 7; const int N = 5e5; const ll inf = 1e18; template <typename T> void vout(T s){cout << s << endl;exit(0);} int main(){ ios_base::sync_with_stdio(0); cin.tie(0); int n; cin >> n; vector <int> a(n), pos(n + 1); int ans = 1 + 2 * n; ll ans1 = 0; int idx = 0; for(int &i : a){ cin >> i; pos[i] = ++idx; } int l, r; l = r = pos[n]; ll uk = 1; for(int len = 1; len <= n; len++){ while(len / 2 + 1 > uk){ l = min(l, pos[n - uk]); r = max(r, pos[n - uk]); uk++; } if(r - l + 1 <= len){ int le1, ri1; ri1 = min(n - len + 1, l); le1 = max(1, r - len + 1); ans1 += ri1 - le1 + 1; } } cout << ans << " " << ans1 << "\n"; return 0; } |
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