#include <iostream>

void solve() {
    int n;
    std::cin >> n;

    int ans = 3;
    for (int x = 1; x * (x + 1) / 2 <= n; ++x) {
        int dx = x * (x + 1) / 2;
        if (n == dx) ans = 1;

        for (int y = 1; y * (y + 1) / 2 + dx <= n; ++y) {
            int dy = y * (y + 1) / 2;
            if (n == dx + dy) ans = std::min(ans, 2);
        }
    }

    std::cout << ans << "\n";
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}