/* -----------------------
Autor: Tomasz Boguslawski
-------------------------- */
#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<fstream>
#include<iomanip>
#include<string>
#include<sstream>
#include<cstring>
#include<map>
#include<vector>
#include<set>
#include<queue>
#include<algorithm>
#include <fstream>
#include<math.h>
#define FOR(x, b, e) for(long x = b; x <= (e); x++)
#define FORD(x, b, e) for(long x = b; x >= (e); x--)
#define VAR(v, n) __typeof(n) v = (n)
#define ALL(c) (c).begin(), (c).end()
#define FOREACH(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i)
#define DEBUG if (debug)
#define MIN(a,b) ((a>b)?b:a)
#define MAX(a,b) ((a>b)?a:b)
#define LL long long
using namespace std;
LL r[1100000];
LL n;
long where[1100000];
long calculate()
{
FOR(i,1,n) where[r[i]]=i;
long left=where[n]; long right=left;
long possi=1; long d=1;
FORD(k,n-1,1)
{
if (where[k]<left) left=where[k];
if (where[k]>right) right=where[k];
long distance=right-left+1;
FOR(q,1,2)
{
d++; if (d>n) return possi;
long pl=right-d+1; if (pl<1) pl=1;
long pr=left; if (pr>n-d+1) pr=n-d+1;
if (pl<=pr) possi+=pr-pl+1;
}
}
return possi;
}
/// MAIN
int main(int argc, char* argv[])
{
// magic formula, which makes streams work faster:
ios_base::sync_with_stdio(0);
cin >> n;
FOR(i,1,n) cin >> r[i];
cout << n*2+1 << " " << calculate() << "\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 | /* ----------------------- Autor: Tomasz Boguslawski -------------------------- */ #include<cstdio> #include<cstdlib> #include<iostream> #include<fstream> #include<iomanip> #include<string> #include<sstream> #include<cstring> #include<map> #include<vector> #include<set> #include<queue> #include<algorithm> #include <fstream> #include<math.h> #define FOR(x, b, e) for(long x = b; x <= (e); x++) #define FORD(x, b, e) for(long x = b; x >= (e); x--) #define VAR(v, n) __typeof(n) v = (n) #define ALL(c) (c).begin(), (c).end() #define FOREACH(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i) #define DEBUG if (debug) #define MIN(a,b) ((a>b)?b:a) #define MAX(a,b) ((a>b)?a:b) #define LL long long using namespace std; LL r[1100000]; LL n; long where[1100000]; long calculate() { FOR(i,1,n) where[r[i]]=i; long left=where[n]; long right=left; long possi=1; long d=1; FORD(k,n-1,1) { if (where[k]<left) left=where[k]; if (where[k]>right) right=where[k]; long distance=right-left+1; FOR(q,1,2) { d++; if (d>n) return possi; long pl=right-d+1; if (pl<1) pl=1; long pr=left; if (pr>n-d+1) pr=n-d+1; if (pl<=pr) possi+=pr-pl+1; } } return possi; } /// MAIN int main(int argc, char* argv[]) { // magic formula, which makes streams work faster: ios_base::sync_with_stdio(0); cin >> n; FOR(i,1,n) cin >> r[i]; cout << n*2+1 << " " << calculate() << "\n"; return 0; }; |
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