n,m=map(int,input().split())
L=list(map(lambda x:x-1,map(int,input().split())))
P=[i for i in range(n)]

for e in L:
  P[e],P[e+1]=P[e+1],P[e]
  
M=P[:]
P2=[i for i in range(n)]
for e in L:
  P2[e],P2[e+1]=P2[e+1],P2[e]
  M[P2[e]]=min( M[P2[e]] , e )
  M[P2[e+1]]=min( M[P2[e+1]] , e+1)
  
ans=[1000]*(n)
for i in range(1,n):
  if P[0]==i:
    ans[i]=0
  else:
    if M[i]==0:
      ans[i]=1
    else:
      ans[i]=M[i]

print(*ans[1:])