#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic pop
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

bool solve() {
  int n;
  cin >> n;
  VI b(n);
  rep(i, n) cin >> b[i];
  VI tb = b;
  VI cnt(n);
  rep(i, n - 1) cnt[i] = b[i], b[i+1] -= b[i];
  if (*min_element(all(cnt)) < 0 || b.back() != 0) return false;
  b = tb;
  int now = 0;
  rep(i, n) {
    if (b[i] & 1) {
      if (i % 2) now++;
      else now--;
    }
    if (abs(now) > cnt[i]) return false;
  }
  return now == 0;
}

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout << (solve() ? "Yes\n" : "No\n");
}