#include<bits/stdc++.h>
#include<math.h>
using namespace std;

/*------------------------------------------------------------------*/

#define ll long long int
#define mp make_pair
#define pb push_back
#define MOD 1000000007

bool isvowel(char c)
{
    if(c=='a'||c=='e'||c=='i'||c=='o'||c=='u')
        return true;
        return false;
}
ll isprime(ll n)
{
    ll ans=1;
    for(ll i=2;i<=sqrt(n);i++)
    {
        if(n%i==0)
            ans = i;
    }
    return ans;
}
ll power(ll a,ll b,ll m)
{
    if(b==0)
        return 1;
    if(b==1)
        return a%m;
    ll temp=power(a,b/2,m);
    if(b%2==0)
        return ((temp%m)*(temp%m))%m;
    else
        return ((((temp%m)*(temp%m))%m)*a%m)%m;
}

/*-----------------------------------------------------------------------------*/

ll c(ll n, ll k)
{
    ll C[n + 1][k + 1];
    ll i, j;

    for (i = 0; i <= n; i++)
    {
        for (j = 0; j <= min(i, k); j++)
        {

            if (j == 0 || j == i)
                C[i][j] = 1;

            else
                C[i][j] = (C[i - 1][j - 1]%MOD +
                          C[i - 1][j])%MOD;
        }
    }
    return C[n][k]%MOD;
}
ll modInverse(ll a, ll m)
{
    ll m0 = m;
    ll y = 0, x = 1;

    if (m == 1)
      return 0;

    while (a > 1)
    {

        ll q = a / m;
        ll t = m;
        m = a % m, a = t;
        t = y;


        y = x - q * y;
        x = t;
    }
    if (x < 0)
       x += m0;

    return x;
}
ll func(ll n)
{
    ll ans=0;
    for(ll i=2;i*i<=n;i++)
    {
        if(n%i==0)
        {
            if(i/10==0)
                ans+=1+func(i)*func(n/i);
            else
                ans+=func(i)*func(n/i);
        }
    }
    return ans;
}
ll dp[205][205][205];
ll check(ll red[],ll gre[],ll blu[],ll r,ll g,ll b,ll i,ll j,ll k)
{
   if(dp[i][j][k]!=-1)
    return dp[i][j][k]; 
   if(i<r&&j<g&&k<b)
   {
       return dp[i][j][k]=max(red[i]*gre[j]+check(red,gre,blu,r,g,b,i+1,j+1,k),max(gre[j]*blu[k]+check(red,gre,blu,r,g,b,i,j+1,k+1),blu[k]*red[i]+check(red,gre,blu,r,g,b,i+1,j,k+1)));
   }
   else if(i<r&&j<g) 
   {
       return dp[i][j][k]=red[i]*gre[j]+check(red,gre,blu,r,g,b,i+1,j+1,k);
   }
   else if(j<g&&k<b)
   {
       return dp[i][j][k]=gre[j]*blu[k]+check(red,gre,blu,r,g,b,i,j+1,k+1);
   }
   else if(i<r&&k<b)
   {
       return dp[i][j][k]=red[i]*blu[k]+check(red,gre,blu,r,g,b,i+1,j,k+1);
   }
   else
   {
       return 0;
   }
}
int main()
{
    ios_base::sync_with_stdio(false);
	cin.tie(NULL);

    //freopen("1.txt","rt",stdin);
    //freopen("output.txt","wwt",stdout);

    ll t;
    t=1;
    //cin>>t;
    //ll t1=0;
    while(t--)
    {
        ll n;
        cin>>n;
        ll a[n];
        for(ll i=0;i<n;i++)
         cin>>a[i];
        ll cnt=0; 
        for(ll i=0;i<n;i++)
        {
            for(ll j=i+1;j<n;j++)
            {
                for(ll k=j+1;k<n;k++)
                {
                   if(a[i]!=a[j]&&a[j]!=a[k]&&a[i]!=a[k])
                   {
                       if(a[i]+a[j]>a[k]&&a[k]+a[j]>a[i]&&a[i]+a[k]>a[j])
                       {
                          // cout<<i<<" "<<j<<" "<<k<<endl;
                           cnt++;
                       }
                   }
                }
            }
        } 
        cout<<cnt<<endl;
    }
}


Measured memory_bytes: 3696