#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;
	for (i = 1, j = 2; i <= N; i++) {
		if (B[i] == 0) continue;
		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;
			for (jj = j; jj > i; jj--) {
				if (B[jj] == 0 || B[jj+1] == 0) break;
				B[jj]--;
				B[jj+1]--;
			}
		}
		if (B[i] > B[i+1]) break;
		B[i+1] -= B[i];
		B[i] = 0;
	}
	if (i > N) printf("Yes\n");
	else printf("No\n");
	fflush(stdout);
	return 0;
}