func main()
	var n: int :: cui@inputInt()
	if(n = 2)
		do cui@print("1\n")
		ret
	end if
	var a: int :: 0
	var b: int :: 0
	for(1, n - 1)
		do a :+ cui@inputInt()
		do b :+ cui@inputInt()
	end for
	var ans: int :: [a, b].min() + 1
	do cui@print("\{ans}\n")
end func