#include <iostream>
#include <cstdio>
#include <cassert>
#include <cstring>
#include <vector>
#include <valarray>
#include <array>
#include <queue>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <algorithm>
#include <cmath>
#include <complex>
#include <random>
 
using namespace std;
using ll = long long;
using ull = unsigned long long;
template<class T = ll> constexpr T TEN(int n) {return (n==0)?1:10*TEN<T>(n-1);}
template<class T> using V = vector<T>;

struct Prime {
    int n;
    vector<bool> used;
    vector<int> pr;
    vector<ull> bpr;
    Prime(int n) : n(n) {
        used = vector<bool>(n+1, false);
        for (int i = 2; i <= n; i++) {
            if (used[i]) continue;
            pr.push_back(i);
            bpr.push_back(((__int128(1)<<64)+i-1) / i);
            for (int j = 2*i; j <= n; j += i) {
                used[j] = true;
            }
        }
    }    
    map<ll, int> fact(ll x) {
        assert(x <= (ll)n*n);
        int pc = (int)pr.size();
        map<ll, int> mp;
        for (int i = 0; i < pc; i++) {
            ll d = pr[i]; ull rd = bpr[i];
//            if (x < d*d) break; 枝刈り
            while (true) {
                ll xd = __int128(x)*rd >> 64;
                if (xd * d != x) break;
                x = xd;
                mp[d]++;
            }
        }
        if (x > 1) mp[x]++;
        return mp;
    }
};



template<class T>
T gcd(T a, T b) {
    a = abs(a); b = abs(b);
    if (b == 0) return a;
    return gcd(b, a%b);
}

template<class T, class U>
T pow_mod(T x, U n, T md) {
    assert(n>=0);
    x %= md;
    T r = 1 % md;
    while (n) {
        if (n & 1) r = (r * x) % md;
        x = (x * x) % md;
        n >>= 1;
    }
    return r;
}

/// g:gcd(a, b), ax+by=g
template<class T> struct EG { T g, x, y; };
template<class T>
EG<T> ext_gcd(T a, T b) {
    if (b==0) {
        if (a >= 0) return EG<T>{a, 1, 0};
        else return EG<T>{-a, -1, 0};
    } else {
        auto e = ext_gcd<T>(b, a%b);
        return EG<T>{e.g, e.y, e.x-a/b*e.y};
    }
}

template<class T>
T inv_mod(T x, T md) {
    auto r = ext_gcd(x, md);
    auto z = r.x;
    return (z % md + md) % md;
}


bool isPrime(ll n) {
    if (n <= 1) return false;
    if (n == 2) return true;
    if (n % 2 == 0) return false;
    ll d = n-1;
    while (d % 2 == 0) d /= 2;
    vector<ll> alist{2,3,5,7,11,13,17,19,23,29,31,37}; // n < 2^64
    for (ll a: alist) {
        if (n <= a) break;
        ll t = d;
        ll y = pow_mod<__int128>(a, t, n); //over
        while (t != n-1 && y != 1 && y != n-1) {
            y = __int128(y)*y % n; //flow
            t <<= 1;
        }
        if (y != n-1 && t % 2 == 0) {
            return false;
        }
    }
    return true;
}

ll f(ll x, ll n) { return __int128_t(x)*x % n + 1 % n; }
ll pollard_single(ll n){
	ll i,x,y,p;
	if(isPrime(n)) return n;
	if(!(n&1)) return 2;
	for(i=1;i<40;i++){
		x=i; y=f(x,n); p=gcd(y-x,n);
		while(p==1) {x=f(x,n); y=f(f(y,n),n); p=gcd((y-x+n)%n,n)%n;}
		if(p==0||p==n) continue;
		return p;
	}
    assert(false);
}

V<ll> pollard(ll n) {
    if (n == 1) return {};
    ll x;
    x = pollard_single(n);
    if (x == n) return {x};
    V<ll> le = pollard(x);
    V<ll> ri = pollard(n/x);
    for (ll d: ri) le.push_back(d);
    return le;
}

const int MP = 100100;
 
ll mul(ll a, ll b) {
    if (TEN(12)/a < b) return TEN(12);
    return a*b;
}
 
int main() {
    Prime pr(MP);
    using P = pair<ll, ll>;
    map<ll, P> g;
    int n;
    scanf("%d", &n);
    bool one = false;
    for (int i = 0; i < n; i++) {
        ll s;
        scanf("%lld", &s);
        auto facv = pollard(s);
        map<ll, int> fac;
        for (auto d: facv) fac[d]++;
//        map<ll, int> fac = pr.fact(s);
        ll d0 = 1, d1 = 1;
        for (auto p: fac) {
            p.second %= 3;
            if (p.second == 1) {
                d0 = mul(d0, p.first);
                d1 = mul(d1, p.first);
                d1 = mul(d1, p.first);
            } else if (p.second == 2) {
                d0 = mul(d0, p.first);
                d0 = mul(d0, p.first);
                d1 = mul(d1, p.first);
            }
        }
        if (d0 == 1) {
            one = true;
            continue;
        }
        if (d0 < d1) {
            g[d0].first++;
        } else {
            g[d1].second++;
        }
    }
 
    int ans = 0;
    for (auto p: g) {
        ans += max(p.second.first, p.second.second);
    }
    cout << ans + (one ? 1 : 0) << endl;
    return 0;
}


Measured memory_bytes: 6656