func main()
	var t: int :: cui@inputInt()
	for(1, t)
		var A: int :: cui@inputInt()
		var B: int :: cui@inputInt()
		var C: int :: cui@inputInt()
		
		; bが最大のとき
		var ans1: int :: 10 ^ 10
		block
			var a: int :: A
			var b: int :: B
			var c: int :: C
			var cnt: int :: 0
			if(a >= b)
				do cnt :+ a - (b - 1)
				do a :: b - 1
			end if
			if(c >= b)
				do cnt :+ c - (b - 1)
				do c :: b - 1
			end if
			if(a = c)
				do cnt :+ 1
				do a :- 1
			end if
			if(a > 0 & c > 0)
				do ans1 :: cnt
			end if
		end block
		
		; bが最小のとき
		var ans2: int :: 10 ^ 10
		block
			var a: int :: A
			var b: int :: B
			var c: int :: C
			var cnt: int :: 0
			if(a = c)
				do cnt :+ 1
				do a :- 1
			end if
			var target: int :: lib@min(a, c)
			if(b >= target)
				do cnt :+ b - (target - 1)
				do b :: target - 1
			end if
			if(b > 0)
				do ans2 :: cnt
			end if
		end block
		
		var ans: int :: lib@min(ans1, ans2)
		if(ans = 10 ^ 10)
			do ans :: -1
		end if
		do cui@print("\{ans}\n")
	end for
end func