#include <cstdio>
#include <vector>
#define mod 666013
using namespace std;
vector <int> x[666013];
vector <int> z[666013];
vector <int> y[666013];
vector <int> :: iterator it;
vector <int> :: iterator it1;
vector <int> :: iterator it2;
int main()
{
    freopen("oite.in","r",stdin);
    freopen("oite.out","w",stdout);
    int n,c,k,i,j,a,b,q,sol=0;
    scanf("%d%d",&n,&c);
    int v[n];
    for(i=0;i<n;i++) scanf("%d",&v[i]);
    for(i=0;i<n-1;i++)
    {
        for(j=i+1;j<n;j++)
        {
            k=v[i]+v[j];
            if(x[(c-k)%mod].size()!=0)
            {   q=0;
        for(it=x[(c-k)%mod].begin(),it1=z[(c-k)%mod].begin(),it2=y[(c-k)%mod].begin();it!=x[(c-k)%mod].end();it++,it1++,it2++)
                {
                    if(*it==c-k&&*it1!=i&&*it2!=j)
                    {
                        q++;
                    }
                }
                sol+=q;
                x[k%mod].push_back(k);
                z[k%mod].push_back(i);
                y[k%mod].push_back(j);
            }
            else {
                x[k%mod].push_back(k);
                z[k%mod].push_back(i);
                y[k%mod].push_back(j);
            }
        }
    }
    printf("%d",sol);
}