Tanssiaiset

n = int(input())

tsum = 0

ppls = list()

tcsum = int((1+n)/2*n)

nghty = 0

for x in range(0, n//2+1):
	a, b = map(int, input().split())
	if a in ppls and not nghty:
		nghty = a

	if b in ppls and not nghty:
		nghty = b
	
	if not nghty:
		ppls.append(a)
		ppls.append(b) 
	tsum = tsum + a + b

total = tsum - tcsum

for x in range(0, len(ppls)):
	if ppls[x] == nghty:
		if x % 2 == 0:
			print(ppls[x], ppls[x+1])
		if x % 2 == 1:
			print(nghty, total-nghty)		

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: WRONG ANSWER

Test 6

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 7

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 8

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 2

Verdict: TIME LIMIT EXCEEDED