#include <stdio.h>

int main()
{
	int i, N, B[200001];
	scanf("%d", &N);
	for (i = 1; i <= N; i++) scanf("%d", &(B[i]));
	
	int j, jj, sub[200003] = {}, tmp = 0;
	for (i = 1, j = 2; i <= N; i++) {
		tmp += sub[i];
		B[i] -= tmp;
		if (B[i] == 0) continue;
		else if (B[i] < 0) break;
		if (i == N) break;
		if (j <= i) j = i + 1;
		if (B[i] % 2 != B[i+1] % 2) {
			for (; j < N; j++) if (B[j] % 2 == B[j+1] % 2) break;
			if (j == N) break;
			sub[j+1] -= 2;
			sub[i+2] += 2;
			B[i+1]--;
			B[j+1]--;
		}
		B[i+1] -= B[i];
	}
	if (i > N) printf("Yes\n");
	else printf("No\n");
	fflush(stdout);
	return 0;
}