package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)
var wr = bufio.NewWriter(os.Stdout)

func out(x ...interface{}) {
	fmt.Fprintln(wr, x...)
}

func getI() int {
	sc.Scan()
	i, e := strconv.Atoi(sc.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func getF() float64 {
	sc.Scan()
	i, e := strconv.ParseFloat(sc.Text(), 64)
	if e != nil {
		panic(e)
	}
	return i
}

func getInts(N int) []int {
	ret := make([]int, N)
	for i := 0; i < N; i++ {
		ret[i] = getI()
	}
	return ret
}

func getS() string {
	sc.Scan()
	return sc.Text()
}

// min, max, asub, absなど基本関数
func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func asub(a, b int) int {
	if a > b {
		return a - b
	}
	return b - a
}

func abs(a int) int {
	if a >= 0 {
		return a
	}
	return -a
}

func lowerBound(a []int, x int) int {
	idx := sort.Search(len(a), func(i int) bool {
		return a[i] >= x
	})
	return idx
}

func upperBound(a []int, x int) int {
	idx := sort.Search(len(a), func(i int) bool {
		return a[i] > x
	})
	return idx
}

const inf = int(1e10)

func f(a, b, c int) int {
	off := 0
	if a == c {
		off = 1
		a--
	}

	mi := 0
	if a > c {
		mi += max(0, b-c+1)
	} else {
		mi += max(0, b-a+1)
	}
	if b-mi <= 0 {
		mi = inf
	}
	mi += off

	ma := off
	l := max(0, a-b+1)
	r := max(0, c-b+1)
	a -= l
	c -= r
	ma += l + r
	if a == c {
		a--
		ma++
	}
	if a == 0 || c == 0 {
		ma = inf
	}
	if mi >= inf && ma >= inf {
		return -1
	}
	return min(mi, ma)
}

func main() {
	defer wr.Flush()
	sc.Split(bufio.ScanWords)
	sc.Buffer([]byte{}, 1000000)
	// this template is new version.
	// use getI(), getS(), getInts(), getF()
	T := getI()
	for i := 0; i < T; i++ {
		a, b, c := getI(), getI(), getI()
		out(f(a, b, c))
	}
}