#include <bits/stdc++.h>
#include <unistd.h>
 
using namespace std;
 
#define DEBUG(x) cerr<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cerr<<#v<<":";for(int i=0;i<v.size();i++) cerr<<" "<<v[i]; cerr<<endl
#define DEBUG_MAT(v) cerr<<#v<<endl;for(int i=0;i<v.size();i++){for(int j=0;j<v[i].size();j++) {cerr<<v[i][j]<<" ";}cerr<<endl;}
 
 
typedef long long ll;
 
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
#define pll pair<ll,ll>
template<class S, class T> pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first + t.first, s.second + t.second); }
template<class S, class T> pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first - t.first, s.second - t.second); }
template<class S, class T> ostream& operator<<(ostream& os, pair<S, T> p) { os << "(" << p.first << ", " << p.second << ")"; return os; }
#define X first
#define Y second
#define rep(i,n) for(int i=0;i<(n);i++)
#define rep1(i,n) for(int i=1;i<=(n);i++)
#define rrep(i,n) for(int i=(n)-1;i>=0;i--)
#define rrep1(i,n) for(int i=(n);i>0;i--)
#define REP(i,a,b) for(int i=a;i<b;i++)
#define in(x, a, b) (a <= x && x < b)
#define all(c) c.begin(),c.end()
template<class T> bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a = b; return 1; } return 0; }
#define UNIQUE(v) v.erase(std::unique(v.begin(), v.end()), v.end());
const ll inf = 1000000001;
const ll INF = (ll)1e18 + 1;
const ll MOD = 1000000007;
//const ll MOD = 998244353;
const double pi = 3.14159265358979323846;
#define Sp(p) cout<<setprecision(15)<< fixed<<p<<endl;
int dx[4] = { -1,0, 1,0 }, dy[4] = { 0,1,0,-1 };
int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };
#define fio() cin.tie(0); ios::sync_with_stdio(false);
// #define mp make_pair
//#define endl '\n'


template <typename T>
class SegmentTree {
public:
  using F = function<T(T&, T&)>;
  int n;
  vector<T > dat;
  T e; // 単位元
  F query_func;
  F update_func;
  
  SegmentTree(vector<T> a, F query_func, F update_func, T e) :n(a.size()), query_func(query_func), update_func(update_func), e(e) {
    dat.resize(4 * n);
    init(0, 0, n, a);
  }

  void init(int k, int l, int r, vector<T> &a) {
    if (r - l == 1) {
      dat[k] = a[l];
    }
    else {
      int lch = 2 * k + 1, rch = 2 * k + 2;
      init(lch, l, (l + r) / 2, a);
      init(rch, (l + r) / 2, r, a);
      dat[k] = query_func(dat[lch], dat[rch]);
    }
  }

  //k番目の値をaに変更
  void update(int k, T a, int v, int l, int r) {
    if (r - l == 1) {
      dat[v] = update_func(dat[v], a);
    }
    else {
      if (k < (l + r) / 2)
        update(k, a, 2 * v + 1, l, (l + r) / 2);
      else {
        update(k, a, 2 * v + 2, (l + r) / 2, r);
      }
      dat[v] = query_func(dat[v * 2 + 1], dat[v * 2 + 2]);
    }
  }
    

  //[a,b)の最小値を求める
  //後ろのほうの引数は計算の簡単のための引数
  //kは接点の番号,l,rはその接点が[l,r)に対応していることを表す
  //従って、外からはquery(a,b,0,0,n)としてよぶ
  T query(int a, int b, int k, int l, int r) {
    if (r <= a || b <= l) {
      return e;
    }
    if (a <= l && r <= b) {
      return dat[k];
    }
    else {
      T ul = query(a, b, k * 2 + 1, l, (l + r) / 2);
      T ur = query(a, b, k * 2 + 2, (l + r) / 2, r);
      return query_func(ul, ur);
    }
  }
};

int min_f(int a, int b) {return min(a, b);}
int max_f(int a, int b) {return max(a, b);}

int main() {
  int n, k;
  cin >> n >> k;
  vi p(n);
  rep (i, n) cin >> p[i];

  set<pii> lr;
  int l = 0, r = 1;
  int pre = p[0];
  while (r <= n) {
    if (r == n) {
      lr.insert(pii(l, r));
      break;
    }
    if (p[r] > pre) {
      pre = p[r];
      r++;
    }
    else {
      lr.insert(pii(l, r));
      l = r; r = r + 1;
      pre = p[l];
    }
  }
  
  SegmentTree<int> min_seg(p, min_f, min_f, inf);
  SegmentTree<int> max_seg(p, max_f, max_f, -inf);
  
  int ans = 1;
  bool al = false;

  auto itr = lr.begin();
  r = itr->second;
  if (r >= k) {
    al = true;
  }
  
  for (int i = 0; i + k < n; i++) {
    auto itr = lr.lower_bound(pii(i + 1, i + inf));
    if (itr != lr.begin()) {
      itr--;
      int l = itr->first, r = itr->second;
      if (l <= i + 1 and r >= i + 1 + k) {
        if (not al) {
          al = true;
          ans++;
        }
        continue;
      }
    }
    
    if (p[i] == min_seg.query(i, i + k, 0, 0, min_seg.n) and p[i + k] == max_seg.query(i + 1, i + k + 1, 0, 0, max_seg.n)) {
      continue;
    }
    else {
      ans++;
    }
  }
  cout << ans << endl;
}


Measured memory_bytes: 12784