#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int N; cin >> N;
    vector<int> A(N);
    rep(i,N) cin >> A[i];

    auto f = [N](vector<int> A) {
        vector<vector<int>> v = {{0}};
        for(int i = 1; i < N; i++) {
            if(v.back().size() == 1u) {
                if(A[v.back().back()] == A[i]) {
                    v.push_back({i});
                } else {
                    v.back().push_back(i);
                }
            } else {
                int a = v.back()[v.back().size() - 2];
                int b = v.back()[v.back().size() - 1];
                if(A[a] < A[b]) {
                    if(A[b] < A[i]) {
                        v.back().push_back(i);
                    } else {
                        v.push_back({i});
                    }
                } else {
                    if(A[b] > A[i]) {
                        v.back().push_back(i);
                    } else {
                        v.push_back({i});
                    }
                }
            }
        }

        int ans = 0;
        int n = v.size();
        for(int i = 0; i + 1 < n; i++) {
            if(v[i].size() >= 2u) {
                if(A[v[i][0]] > A[v[i][1]]) {
                    int L = v[i].size();
                    int R = v[i + 1].size();
                    if(L == R + 1 && A[v[i].back()] < A[v[i + 1][0]]) {
                        ans = max(ans, R);
                    }
                }
            }
        }

        return ans;
    };

    int ans = f(A);
    for(auto &i : A) i *= -1;
    ans = max(ans, f(A));
    cout << ans << endl;
}