#include <iostream>

#define FORR(i,b,e) for(int i=(b);i<(int)(e);++i)
#define FOR(i,e) FORR(i,0,e)
#define dump(var) cerr << #var ": " << var << "\n"
#define dumpc(con) for(auto& e: con) cerr << e << " "; cerr<<"\n"

typedef long long ll;
typedef unsigned long long ull;

const double EPS = 1e-6;
const int d4[] = {0, -1, 0, 1, 0};

using namespace std;

int A[1000010];

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int N;
    cin >> N;
    FOR(i, N) cin >> A[i];

    ll count = 0;
    int d;
    FOR(i, N) FOR(j, i) {
        d = A[i]-A[j];
        FOR(k, j) count += (d*(A[j]-A[k])<0 && A[i]!=A[k]);
    }
    cout << count << endl;

    return 0;
}