import std.stdio, std.conv, std.functional, std.string;
import std.algorithm, std.array, std.container, std.range, std.typecons;
import std.bigint, std.numeric, std.math, std.random;
import core.bitop;

string FMT_F = "%.10f";

static File _f;
void file_io(string fn) { _f = File(fn, "r"); }
static string[] s_rd;
T _RD(T = long)() { while(!s_rd.length) s_rd = readln.chomp.split; string res = s_rd[0]; s_rd.popFront; return res.to!T; }
T _RD(T = long)(File f) { while(!s_rd.length) s_rd = f.readln.chomp.split; string res = s_rd[0]; s_rd.popFront; return res.to!T; }
T[] _RDA(T = long)(T fix = 0) { auto r = readln.chomp.split.to!(T[]); r[] += fix; return r; }
T[] _RDA(T = long)(File f, T fix = 0) { auto r = f.readln.chomp.split.to!(T[]); r[] += fix; return r; }
T RD(T = long)() { if (_f.isOpen) return _RD!T(_f); else return _RD!T; }
T[] RDA(T = long)(T fix = 0) { if (_f.isOpen)  return _RDA!T(_f, fix); else return _RDA!T(fix); }

size_t[] MAKE_IDX(alias less = "a < b", Range)(Range range) { auto idx = new size_t[](range.length); makeIndex!(less)(range, idx); return idx;}
size_t MIN_POS(alias less = "a < b", Range)(Range range) { auto r = minPos!(less)(range); return range.length - r.length; }

void chmin(T)(ref T x, T y) { x = min(x, y); } void chmax(T)(ref T x, T y) { x = max(x, y); }
bool inside(T)(T x, T b, T e) { return x >= b && x < e; }
long lcm(long x, long y) { return x * (y / gcd(x, y)); }

long mod = 10^^9 + 7;
//long mod = 998244353;
//long mod = 1_000_003;
void moda(ref long x, long y) { x = (x + y) % mod; }
void mods(ref long x, long y) { x = ((x + mod) - (y % mod)) % mod; }
void modm(ref long x, long y) { x = (x * y) % mod; }
void modpow(ref long x, long y) { if (!y) { x = 1; return; } auto t = x; x.modpow(y>>1); x.modm(x); if (y&1) x.modm(t); }

void main()
{
	auto T = RD;
	auto ans = new long[](T);
	foreach (ti; 0..T)
	{
		auto A = RD;
		auto B = RD;
		auto C = RD;

		if ((A > B && A < C) || (A < B && A > C)) continue;
		if ((C > B && C < A) || (C < B && C > A)) continue;

		if ((A == 1 && B == 2) || (C == 1 && B == 2))
		{
			ans[ti] = -1;
			continue;
		}
		if (A <= 2 && B <= 2 && C <= 2)
		{
			ans[ti] = -1;
			continue;
		}
		if ((A == 1 && C == 1) || (A == 1 && B == 1) || (C == 1 && B == 1))
		{
			ans[ti] = -1;
			continue;
		}

		long t = long.max;
		if (A < C)
		{
			if (A != 1)
				t.chmin(B - A + 1);
			if (B != 1)
			{
				if (A == B-1)
					t.chmin(C - B + 2);
				else
					t.chmin(C - B + 1);
			}
		}
		else if (A > C)
		{
			if (C != 1)
				t.chmin(B - C + 1);
			if (B != 1)
			{
				if (C == B-1)
					t.chmin(A - B + 2);
				else
					t.chmin(A - B + 1);
			}
		}
		else
		{
			if (A < B)
				t.chmin(1);
			else if (A == B+1)
				t.chmin(2);
			else if (A == B)
				t.chmin(3);
			else
				t.chmin(1);
		}
		ans[ti] = t;
	}

	foreach (e; ans)
		writeln(e);
	stdout.flush;
	debug readln;
}