#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <atcoder/modint>
using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(int)(n); i++)


const i64 INF = 1001001001001001001;
using modint = atcoder::static_modint<1000000007>;


int main(){
    int N; cin >> N;
    i64 M; cin >> M;
    map<i64, pair<int,int>> A;
    int t = 0;
    rep(i,N){
        i64 a; cin >> a;
        a %= M;
        if(a == 0) t = 1;
        else{
            if(M-a < a) A[a].first++; else A[M-a].second++;
        }
    }
    for(auto a : A) t += max(a.second.first, a.second.second);
    cout << t << endl;
    return 0;
}


struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;