n = int(input().strip())
a = [int(i) for i in input().strip().split(' ')]

for i in range(2*n-3):
  for j in range(len(a) - 1):
    for k in range(j, len(a)):
      if a[j] + a[k] == i:
        if a[j] > a[k]:
          a[j], a[k] = a[k], a[j]

print(' '.join([str(i) for i in a]))