#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <complex>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <iomanip>
#include <assert.h>
#include <array>
#include <cstdio>
#include <cstring>
#include <random>
#include <functional>
#include <numeric>
#include <bitset>

using namespace std;

#define REP(i,a,b) for(int i=a;i<(int)b;i++)
#define rep(i,n) REP(i,0,n)
#define all(c) (c).begin(), (c).end()
#define zero(a) memset(a, 0, sizeof a)
#define minus(a) memset(a, -1, sizeof a)
#define minimize(a, x) a = std::min(a, x)
#define maximize(a, x) a = std::max(a, x)

typedef long long ll;
int const inf = 1<<29;

int main() {

  int N; cin >> N;
  vector<int> X(N);
  rep(i, N) { cin >> X[i]; }

  sort(all(X));

  vector<bool> erased(N);

  int ans = N;
  bool update = 1;
  while(update) {
    update = 0;
    rep(i, X.size()-1) {
      if((X[i+1] - X[i]) % 2 == 0) {
        X[i+1] = X[i] + 2;
      }
      else {
        X[i+1] = X[i] + 1;
      }
    }
    REP(i, 1, X.size()) {
      if(!erased[i-1] && (X[i]-X[i-1]) % 2) {
        erased[i] = erased[i-1] = 1;
        ans -= 2;
        update = 1;
      }
    }

    rep(i, X.size()) {
      if(erased[i]) {
        X.erase(X.begin() + i);
        erased.erase(erased.begin() + i);
        i--;
      }
    }

  }
//  rep(i, N) { cout << (erased[i] ? "---" : to_string(X[i])) << " ";}cout << endl;

  cout << ans << endl;

  return 0;
}