#include <bits/stdc++.h>
using namespace std;
int n;
int tab[1000100];
int ind[1000100];
int main()
{
ios_base::sync_with_stdio(0);
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>tab[i];
ind[tab[i]]=i;
}
int left=10001000;
int right=-2;
long long wynik=0;
for(int i=n;i>0;i--)
{
int k=(i+n)/2;
left=min(left,ind[k]);
right=max(right,ind[k]);
if(right-left+1<=n-i+1)
{
int a=left-1;
int b=n-right;
int m=n-i+left-right;
int X=a+b-m+1;
int A=max(0,a-m);
int B=max(0,b-m);
wynik+=X-A-B;
}
// cout<<left<<" "<<right<<" "<<wynik<<endl;
}
cout<<2*n+1<<" "<<wynik;
}
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 | #include <bits/stdc++.h> using namespace std; int n; int tab[1000100]; int ind[1000100]; int main() { ios_base::sync_with_stdio(0); cin>>n; for(int i=1;i<=n;i++) { cin>>tab[i]; ind[tab[i]]=i; } int left=10001000; int right=-2; long long wynik=0; for(int i=n;i>0;i--) { int k=(i+n)/2; left=min(left,ind[k]); right=max(right,ind[k]); if(right-left+1<=n-i+1) { int a=left-1; int b=n-right; int m=n-i+left-right; int X=a+b-m+1; int A=max(0,a-m); int B=max(0,b-m); wynik+=X-A-B; } // cout<<left<<" "<<right<<" "<<wynik<<endl; } cout<<2*n+1<<" "<<wynik; } |
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