#include <bits/stdc++.h>
#include <random>

using namespace std;

typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
#define double ld
//#define int ll
//#define int __int128
//#define ll __int128
typedef pair<int, int   > pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<pii> vpi;
typedef vector< vi > vvi;
typedef vector< vvi > vvvi;
typedef vector<short> vs;
typedef vector<vs> vvs;
typedef vector<vvs> vvvs;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<vvl> vvvl;
typedef vector<ld> vld;
typedef vector<vld> vvld;
typedef vector<vvld> vvvld;
typedef vector<string> vst;
typedef vector<vst> vvst;
typedef pair<ld, ld> pld;
//typedef complex<double> base;

#define inmin(a, b) a = min(a, (b))
#define inmax(a, b) a = max(a, (b))
#define ALL(a) a.begin(),a.end()
#define RALL(a) a.rbegin(),a.rend()
#define sqr(x) ((x) * (x))
#define fori(i, n) for(int i = 0; i < (int)(n); ++i)
#define SZ(a) ((int)((a).size()))
#define triple(T) tuple<T, T, T>
#define quad(T) tuple<T, T, T, T>
#define watch(x) cerr << (#x) << " = " << (x) << endl;

#ifdef RUS_HOME
#define cerr cout
#else
#define cerr if (false) cerr
#endif

const double PI = 2 * acos(0.0);
#define rand shittttty_shit
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng_64(chrono::steady_clock::now().time_since_epoch().count());

const string DIGITS = "0123456789";
const string ALPH = "abcdefghijklmnopqrstuvwxyz";

template <class T0, class T1>
inline ostream & operator << (ostream &out, pair<T0, T1> &a) {
    return out << "{" << a.first << ", " << a.second << "}";
}

template <class T0, class T1, class T2>
inline ostream & operator << (ostream &out, tuple<T0, T1, T2> &a) {
    return out << "{" << get<0>(a) << ", " << get<1>(a) << ", " << get<2>(a) << "}";
}

template <class T0, class T1, class T2, class T3>
inline ostream & operator << (ostream &out, tuple<T0, T1, T2, T3> &a) {
    return out << "{" << get<0>(a) << ", " << get<1>(a) << ", " << get<2>(a) << ", " <<  get<3>(a) << "}";
}

template<class T>
inline ostream & operator << (ostream &out, vector<T> &a) {
    out << "[";
    fori (i, a.size())
        out << a[i] << vector<string>{", ", "]  "}[i + 1 == a.size()];
    return out;
}



void smain();

signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

#ifdef RUS_HOME
    freopen("input.txt", "r", stdin);
    clock_t start = clock();
#endif
    cout << setprecision(12) << fixed;
    smain();
#ifdef RUS_HOME
    cout << "\n\n\n\nTOTAL EXECUTION TIME: " << float( clock () - start ) /  CLOCKS_PER_SEC << endl;
#endif
    return 0;
}

const int N = 2e5, oo = 1e9;
int p[N];
int t[4 * N], d[4 * N], pref[N];
void build(int v, int tl, int tr) {
    if (tl == tr) {
        t[v] = p[tl];
        d[v] = p[tl];
    } else {
        int tm = tl + tr >> 1;
        build(v << 1, tl, tm);
        build(v << 1 | 1, tm + 1, tr);
        t[v] = min(t[v << 1], t[v << 1 | 1]);
        d[v] = max(d[v << 1], d[v << 1 | 1]);
    }
}

int mx, mn;
void get(int v, int tl, int tr, int l, int r) {
    if (l > r)
        return;
    if (tl == l && tr == r) {
        inmax(mx, d[v]);
        inmin(mn, t[v]);
        return;
    }
    int tm = tl + tr >> 1;
    get(v << 1, tl, tm, l, min(tm, r));
    get(v << 1 | 1, tm + 1, tr, max(tm + 1, l), r);
}


void smain() {

    int n, k;
    cin >> n >> k;
    int cnt = 1;
    for (int i = 0; i < n; i++) {
        cin >> p[i];
        if (i) {
            if (p[i] > p[i - 1])
                cnt++;
            else {
                cnt = 1;
            }
        }
        pref[i] = cnt;
    }
    build(1, 0, n - 1);

    int ans = 1, ch = (pref[k - 1] >= k);
    for (int i = 0; i + k < n; i++) {
        mn = oo;
        mx = -oo;
        get(1, 0, n - 1, i, i + k);
        if (!(mn == p[i] && mx == p[i + k])) {
            ans++;
            if (pref[i + k] >= k)
                ch++;
        }
    }

    if (ch > 0)
        ans -= (ch - 1);
    cout << ans;


}

Measured memory_bytes: 7168