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#include <bits/stdc++.h>

#define rep(a,b,c) for(auto a = (b); a != (c); a++)
#define repD(a,b,c) for(auto a = (b); a != (c); a--)
#define repIn(a, b) for(auto& a : (b))
#define repIn2(a, b, c) for(auto& [a, b] : (c))

constexpr bool dbg = 1;
#define DEBUG if constexpr(dbg)
#define DC DEBUG std::cerr
#define eol std::endl

#define int long long
#define ld long double
#define pb push_back

using namespace std;
#define rg ranges

int32_t main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
    int n;
    cin >> n;
    vector<int> v(n);
    rep(i, 0, n) cin >> v[i];
    int sum = 0;
    int mx = n;
    rep(i, 0ll, n) {
        sum += v[i];
        if(i && v[i] < v[i - 1]) mx = min(mx, i);
        if(i + 1 < n && v[i] < v[i + 1]) mx = min(mx, n - i + 1);
    }
    repD(chk, mx, 1) if(sum % chk == 0) {
        vector<int> hr(n);
        int cur = 0;
        bool g = 1;
        rep(i, 0ll, n) {
            cur -= (i - chk >= 0 ? hr[i - chk] : 0);
            if(v[i] < cur || (i + chk > n && v[i] != cur)) { g = 0; break; }
            hr[i] = v[i] - cur;
            cur = v[i];
        }
        if(g) { cout << chk << '\n'; return 0; }
    }
    cout << "1\n";
}