#include <bits/stdc++.h>
#define pb push_back
#define ins insert
using namespace std;


struct psycho {
    int aim;
    int val;
};

int n;
vector<psycho> ps;
set<int> killers;
int killedThisIter=100;
int timeTaken=0;

void init() {
    psycho back;
    back.aim=-1;
    back.val=2147483647;
    ps.pb(back);

    cin>>n;

    vector<int> ids(n); for (int i=0; i<n; i++) {cin>>ids[n-i-1];}

    for (int i=0; i<n; i++) {
        psycho ss;
        ss.aim=i;
        ss.val=ids[i];
        ps.pb(ss);
        killers.ins(i+1);
    }
    psycho front;
    front.aim=-1;
    front.val=2147483647;
    ps.pb(front);

}

void Kill_People() {
    int killed=0;
    vector<int> nokill;
    for (auto i : killers) {
        if (ps[i].val>ps[ps[i].aim].val) {
            ps[i].aim=ps[ps[i].aim].aim;
            killed++;
            nokill.pb(ps[i].aim);
        } else {
            nokill.pb(i);
        }
    }

    for (auto i : nokill) {
        if (killers.find(i)!=killers.end()) {killers.erase(i);}
    }

    killedThisIter=killed;
    if (killed>0) { timeTaken++;}
}

bool Can_Kill() {
    return killedThisIter;
}

int main() {
    init();

    while (Can_Kill()) {
        Kill_People();
    }

    cout<<timeTaken;

    return 0;
}