#include<iostream>
#include<cstring>
#include<vector>
#include<iomanip>
#include<algorithm>
#include<numeric>
#include<set>
#include<map>
using namespace std;
using LL = long long;

const int BASE = 1e9, WIDTH = 9;
using BigInt = vector<int>;

BigInt operator+(const BigInt &a, const BigInt &b){
    BigInt c(max(a.size(), b.size()) + 1);
    for(int i = 0; i < (int)a.size(); i++){
        c[i] += a[i];
    }
    for(int i = 0; i < (int)b.size(); i++){
        c[i] += b[i];
    }
    for(int i = 0; i < (int)c.size(); i++){
        if (c[i] >= BASE){
            c[i + 1] += 1;
            c[i] -= BASE;
        }
    }
    while(c.size() > 1 && c.back() == 0){
        c.pop_back();
    }
    return c;
}

BigInt operator-(const BigInt &a, const BigInt &b){
    BigInt c(max(a.size(), b.size()));
    for(int i = 0; i < (int)a.size(); i++){
        c[i] += a[i];
    }
    for(int i = 0; i < (int)b.size(); i++){
        c[i] -= b[i];
    }
    for(int i = 0; i < (int)c.size(); i++){
        if (c[i] < 0){
            c[i + 1] -= 1;
            c[i] += BASE;
        }
    }
    while(c.size() > 1 && c.back() == 0){
        c.pop_back();
    }
    return c;
}

BigInt operator*(const BigInt &a, int b){
    BigInt c(a.size() + 1);
    long long t = 0;
    for(int i = 0; i < (int)a.size(); i++){
        t += 1LL * a[i] * b;
        c[i] = t % BASE;
        t /= BASE;
    }
    c.back() = t;
    while(c.size() > 1 && c.back() == 0){
        c.pop_back();
    }
    return c;
}

pair<BigInt, long long> operator/(const BigInt &a, int b){
    BigInt c;
    c.reserve(a.size());
    long long r = 0;
    for(int i = (int)a.size() - 1; i >= 0; i--){
        r = r * BASE + a[i];
        c.push_back(r / b);
        r %= b;
    }
    reverse(c.begin(), c.end());
    while(c.size() > 1 && c.back() == 0){
        c.pop_back();
    }
    return {c, r};
}

bool operator<(const BigInt &a, const BigInt &b){
    if (a.size() != b.size()){
        return a.size() < b.size();
    }
    for(int i = (int)a.size() - 1; i >= 0; i--){
        if (a[i] != b[i]){
            return a[i] < b[i];
        }
    }
    return false;
}

BigInt str2int(const string &s){
    BigInt a;
    a.reserve(s.size() / WIDTH + 1);
    int base = 1, val = 0;
    for(int i = (int)s.size() - 1; i >= 0; i--){
        val += (s[i] - '0') * base;
        base *= 10;
        if (base == BASE){
            a.push_back(val);
            base = 1, val = 0;
        }
    }
    if (a.empty() || val) a.push_back(val);
    return a;
}

ostream &operator<<(ostream &os, const BigInt &A) { 
    os << A.back();
    for(int i = (int)A.size() - 2; i >= 0; i--)
        os << setw(WIDTH) << setfill('0') << A[i];
    return os;
}

const int N = 5000;
BigInt fib[N + 5];
int fib1[N + 5], fib2[N + 5];

const int mod1 = 1e9 + 7, mod2 = 998244353;

int main(){

#ifdef LOCAL
    freopen("data.in", "r", stdin);
    freopen("data.out", "w", stdout);
#endif

    cin.tie(0);
    cout.tie(0);
    ios::sync_with_stdio(0);

    fib[1] = str2int("1");
    fib[2] = str2int("2");
    fib1[1] = fib2[1] = 1;
    fib1[2] = fib2[2] = 2;
    for(int i = 3; i <= N; i++){
        fib[i] = fib[i - 2] + fib[i - 1];
        fib1[i] = (fib1[i - 2] + fib1[i - 1]) % mod1;
        fib2[i] = (fib2[i - 2] + fib2[i - 1]) % mod2;
    }

    int n;
    cin >> n;
    vector<BigInt> a(n);
    vector<int> a1(n), a2(n);
    for(int i = 0; i < n; i++){
        string s;
        cin >> s;
        a[i] = str2int(s);
        int v1 = 0, v2 = 0;
        for(auto c : s){
            v1 = (v1 * 10LL + c - '0') % mod1;
            v2 = (v2 * 10LL + c - '0') % mod2;
        }
        a1[i] = v1;
        a2[i] = v2;
    }
    vector<int> id(n);
    iota(id.begin(), id.end(), 0);
    sort(id.begin(), id.end(), [&](int x, int y){
        return a[x] < a[y];
    });

    set<pair<int, int> > s;
    for(int i = 1; i <= N; i++){
        s.insert({fib1[i], fib2[i]});
    }

    LL ans = 0;

    map<pair<int, int>, int> mp;

    for(int i = 0; i < n; i++){
        int x = id[i];
        if (fib[N - 2] < a[x]){
            for(int j = 0; j < i; j++){
                int v1 = (a1[id[j]] + a1[x]) % mod1;
                int v2 = (a2[id[j]] + a2[x]) % mod2;
                if (s.contains({v1, v2})){
                    ans += 1;
                }
            }
        }
        else{
            int rk = lower_bound(fib + 1, fib + N + 1, a[x], [&](auto &&a, auto &&b){
                return a < b;
            }) - fib;
            for(auto y : {rk, rk + 1}){
                int v1 = (fib1[y] - a1[x] + mod1) % mod1;
                int v2 = (fib2[y] - a2[x] + mod2) % mod2;
                if (mp.contains({v1, v2})){
                    ans += mp[{v1, v2}];
                }
            }
        }
        mp[{a1[x], a2[x]}] += 1;
    }
    cout << ans << '\n';

}