#include<iostream>
#include<vector>
#include<numeric>
#include<set>
#include<deque>
#include<algorithm>
#include<queue>
#include<math.h>
#include<tuple>
#include<functional>
#include<limits>
#include<map>
#include<stack>
#include<string>
#include<stdio.h>

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define Rep(i,a,n) for(int i=(int) a;i<(int) n;i++)
#define ALL(a)  a.begin(),a.end()
#define Upper(a,n) upper_bound(((vector<ll>)a).begin(), (a).end(),(int) n) - a.begin();
#define Lower(a,n) lower_bound(((vector<ll>)a).begin(), (a).end(),(int) n) - a.begin();
using namespace std;
using ll = long long;
using ld = long double;
typedef pair<ll, ll> PLL;
typedef pair<int, int> PII;


long long INF = 9223372036854775807;
int dx[4] = { 0,1,0,-1 }; int dy[4] = { 1,0,-1,0 };
string EIKO = "abcdefghijklmnopqrstuvwxyz";

template<typename T>
T gcd(T  a, T b) {
	if (a % b == 0) {
		return b;
	}
	else {
		return gcd(b, a % b);
	}
}

ll Pow(ll a, ll n) {
	if (n == 0) return 1;
	if (n == 1) return a;
	if (n % 2 == 1) return (a * Pow(a, n - 1));
	ll t = Pow(a, n / 2);
	return (t * t);
}
ll U = Pow(10, 9) + 7;
template<typename T>
ll kuraiwa(T n) {
	int x = 0; ll y = 0;
	while (n != 0)
	{
		y += (n % 10);
		n /= 10;
		x++;
	}
	return y;
}

template<typename T>
long long modPow(T a, T n, T p) {
	if (n == 0) return 1;
	if (n == 1) return a % p;
	if (n % 2 == 1) return (a * modPow(a, n - 1, p)) % p;
	long long t = modPow(a, n / 2, p);
	return (t * t) % p;
}

template<typename T>
vector<int> bittify(T n) {
	vector<int> a;
	while (n != 0) {
		int s = n % 2;
		a.push_back(s);
		n /= 2;
	}
	return a;
}

template<typename T>
ll sinsuu(T xyz, T yzx, T abc) {
	ll b = 0, h = 0;
	while (abc != 0) {
		int g = abc % 10;
		abc /= 10;
		b += g * Pow(xyz, h);
		h++;
	}
	if (yzx == 10) {
		return b;
	}
	ll c = 0; h = 0;
	while (b != 0) {
		c += (b % yzx) * Pow(10, h);
		h++;
	}
	return c;
}


template<typename T>
bool sosuu(T x) {
	for (int i = 2; i * i <= x;i++) {
		if (x % i == 0)
			return false;
	}
	return true;
}

template<typename T>
vector<ll> bunnkai(T x) {
	vector<ll> a;
	ll n = 2;
	while (x != 1) {
		while (x % n == 0) {
			a.push_back(n);
			x /= n;
			if (x == 1)
				break;
		}
		if (n >= sqrt(x))
			break;
		n++;
	}
	if (x != 1)
		a.push_back(x);
	return a;
}

template<typename T>
vector<ll> yakusuu(T x) {
	vector<ll> a;
	for (ll i = 1; i * i <= x; i++) {
		if (x % i == 0) {
			a.push_back(i);
			if (i != x / i) {
				a.push_back(x / i);
			}
		}
	}
	sort(ALL(a));
	return a;
}


template<typename T>
unsigned int factorial(T n) {
	unsigned int ans;

	ans = 1;
	for (unsigned int i = 2; i <= n; i++) {
		ans *= i;
	}

	return ans;
}

int main() {
	ll n, m; cin >> n >> m;
	vector<ll>a(n);
	rep(i, n)cin >> a[i];
	map<ll, ll> S;
	rep(i, n) {
		a[i] %= m;
		S[a[i]]++;
	}
	int ans = n;
	for (auto i : S) {
        if (i.first == 0 and i.second >= 2)
			ans -= i.second - 1;

		else if (i.first * 2 < m) {
			if (S[m - i.first] > 0) {
				ans -= min(i.second, S[m - i.first]);
			}
		}
		else if (i.first * 2 == m)
			ans -= i.second - 1;
		
	}
	cout << ans << endl;
}