N=int(input())
B=list(map(int,input().split()))
for i in range(0,N,2):
    B[i]+=1
pos=[]
for i in range(N):
    if B[i]%2:
        pos.append(i)
for i in range(0,N,2):
    B[i]-=1
if len(pos)!=(N+1)//2:
    print("No")
    exit()
adj=[]
for i in range(N-1):
    adj.append(B[i])
    B[i+1]-=B[i]
add=[0]*N
for i in range(0,N,2):
    add[min(i,pos[i//2])]+=1
    add[max(i,pos[i//2])]-=1
for i in range(N-1):
    adj[i]-=add[i]
    add[i+1]+=add[i]
pm=0
for i in adj:
	pm=max(pm,i%2)
if min(adj)>=0 and pm==0 and B[-1]==0:
    print("Yes")
else:
    print("No")