A.cpp

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define all(v) v.begin(),v.end()
#define X first
#define Y second
#define forn(x, y, z) for(ll (z) = (x); (z) < (y); (z)++)

void debug_out() { cerr << '\n'; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << H << ' ';
    debug_out(T...);
}

int constexpr N = 1e5;
int constexpr MOD = 1e9 + 7;
int constexpr INF = 1e9;

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

    int n;
    cin >> n;
    int l = 1, last, best = 1;
    cin >> last;
    forn (1, n, i) {
        int a;
        cin >> a;
        if (a >= last) l++;
        else l = 1;
        best = max(l, best);
        last = a;
    }
    cout << best;
    return 0;
}