#include using namespace std; typedef long long int ll; typedef pair P; typedef vector VI; typedef vector VVI; #define REP(i,n) for(int i=0;i<(n);i++) #define ALL(v) v.begin(),v.end() template bool chmax(T& x, const T& y){return (x bool chmin(T& x, const T& y){return (x>y)?(x=y,true):false;}; constexpr ll MOD=998244353; constexpr ll INF=2e18; int main(){ ll n, p; cin >> n >> p; VI a(n); REP(i,n) cin >> a[i]; sort(ALL(a)); ll ans=0; for(ll x=p;x<=2e9;x*=p){ map mp; REP(i,n){ ans+=mp[a[i]%x]; mp[a[i]%x]++; } } cout << ans << endl; return 0; }