teams = raw_input("Enter number of teams : ")
teams = int(teams)
teams = (teams/2)*2

if teams < 2 : teams = 2
pattern = [x for x in range(1, teams+1)]

print
print '"Round Robin" draw for ', teams, ' teams ', pattern 
print

for round in range(teams-1):
    print "Round ", round
    print pattern[:teams/2]
    print (pattern[teams/2:])[::-1]
    pattern = pattern[:1]+pattern[-1:]+pattern[1:-1]
    print