#include <bits/stdc++.h>

using i32 = std::int32_t;
using u32 = std::uint32_t;
using i64 = std::int64_t;
using u64 = std::uint64_t;
using isize = std::ptrdiff_t;
using usize = std::size_t;

class rep {
    struct Iter {
        usize itr;
        constexpr Iter(const usize pos) noexcept : itr(pos) {}
        constexpr void operator++() noexcept { ++itr; }
        constexpr bool operator!=(const Iter& other) const noexcept { return itr != other.itr; }
        constexpr usize operator*() const noexcept { return itr; }
    };
    const Iter first, last;

  public:
    explicit constexpr rep(const usize first, const usize last) noexcept : first(first), last(std::max(first, last)) {}
    constexpr Iter begin() const noexcept { return first; }
    constexpr Iter end() const noexcept { return last; }
};

template <class T> using Vec = std::vector<T>;

void main_() {
    std::string S;
    std::cin >> S;
    usize cnt = 0, sum = 0;
    for (const auto i : rep(0, S.size())) {
        if (S[i] == '1') {
            cnt += 1;
            sum += i;
        }
    }
    std::map<std::pair<usize, usize>, u64> dp;
    dp[{0, 0}] += 1;
    while (cnt--) {
        std::map<std::pair<usize, usize>, u64> next;
        for (const auto& [p, c] : dp) {
            const auto& [n, s] = p;
            for (const auto i : rep(n, S.size())) {
                if (s + i <= sum) {
                    next[{i + 1, s + i}] += c;
                }
            }
        }
        dp = std::move(next);
    }
    u64 ans = 0;
    for (const auto& [p, c] : dp) {
        if (p.second == sum) {
            ans += c;
        }
    }
    std::cout << ans << '\n';
}

int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    main_();
    return 0;
}