#include<bits/stdc++.h>

uint64_t mod = 1836311903;
uint64_t mod2 = 1836311903;

const int K = 2200;

uint64_t add(uint64_t a, uint64_t b) {
    return a + b >= mod ? a + b - mod : a + b;
}
uint64_t sub(uint64_t a, uint64_t b) {
    return a >= b ? a - b : a + mod - b;
}
uint64_t mul(uint64_t a, uint64_t b) {
    return 1ll * a * b % mod;
}

std::vector<uint64_t> st, hsh;

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

    {
        uint64_t a = 0, b = 1;
        st = {a, b};
        for (int i = 0; i < 1e7; ++i) {
            uint64_t c = add(a, b);
            st.push_back(c);
            a = b;
            b = c;
        }
        std::sort(st.begin(), st.end());
        st.resize(std::unique(st.begin(), st.end()) - st.begin());
    }

    {
        mod = (1ll << 61) - 1;
        uint64_t a = 0, b = 1;
        hsh = {a, b};
        for (int i = 0; i < 1e7; ++i) {
            uint64_t c = add(a, b);
            hsh.push_back(c);
            a = b;
            b = c;
        }
        std::sort(hsh.begin(), hsh.end());
    }

    int n;
    std::cin >> n;
    std::map<int64_t, std::vector<int64_t>> mp;
    int ans = 0;
    for (int i = 0; i < n; ++i) {
        std::string s;
        std::cin >> s;
        int64_t h1 = 0, h2 = 0;
        for (auto x : s) {
            h1 = add(mul(h1, 10), x - '0');
            h2 = (h2 * 10 + (x - '0')) % mod2;
        }
        for (auto h : st) {
            int64_t need = h - h2;
            if (need < 0) need += mod2;
            for (auto h3 : mp[need]) {
                ans += std::binary_search(hsh.begin(), hsh.end(), add(h1, h3));
            }
        }
        mp[h2].push_back(h1);
    }
    std::cout << ans;
}