#include <bits/stdc++.h>
#define REP(i, n) for (int i = 0; (i) < (int)(n); ++(i))
#define REP3(i, m, n) for (int i = (m); (i) < (int)(n); ++(i))
#define REP_R(i, n) for (int i = (int)(n)-1; (i) >= 0; --(i))
#define REP3R(i, m, n) for (int i = (int)(n)-1; (i) >= (int)(m); --(i))
#define ALL(x) ::std::begin(x), ::std::end(x)
using namespace std;

int mex(int a, int b) {
    if (a != 1 and b != 1) return 1;
    if (a != 2 and b != 2) return 2;
    if (a != 3 and b != 3) return 3;
    if (a != 4 and b != 4) return 4;
    assert (false);
}

int64_t solve(int n, vector<int64_t> a) {
    int64_t ans = 0;
    array<int, 4> k = {};
    REP (i, n) {
        int b = min<int64_t>(3, a[i]);
        REP3 (c, 1, 4) {
            ans += k[c] * mex(b, c);
        }
        k[b] += 1;
    }
    return ans;
}

// generated by oj-template v4.7.2 (https://github.com/online-judge-tools/template-generator)
int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    constexpr char endl = '\n';
    int N;
    cin >> N;
    vector<int64_t> A(N);
    REP (i, N) { cin >> A[i]; }
    auto ans = solve(N, A);
    cout << ans << endl;
    return 0;
}