#include <iostream>
#include <vector>
using namespace std;

int main(){
    int n; cin >> n;
    vector<int> a(n);
    for(auto &it: a) cin >> it;

    vector<bool> b(n-1);
    for(int i = 0; i < n; i++) b[i] = a[i] < a[i+1];
    vector<int> Q;
    for(int i = 0; i < n-2; i++){
        if(b[i] && !b[i+1]) Q.emplace_back(i);
    }
    int ans = 0;
    while(!Q.empty()){
        int c = Q.back(); Q.pop_back();
        ans++;
        b[c] = false;
        b[c+1] = true;
        if(c-1 >= 0 && b[c-1] && !b[c]) Q.emplace_back(c-1);
        if(c+2 < n-1 && b[c+1] && !b[c+2]) Q.emplace_back(c+1);
    }

    cout << ans << endl;
    return 0;
}