package main

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

func configure(scanner *bufio.Scanner) {
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
}
func getNextString(scanner *bufio.Scanner) string {
	scanned := scanner.Scan()
	if !scanned {
		panic("scan failed")
	}
	return scanner.Text()
}
func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}
func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}
func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	extra := 0
	if os.Getenv("I") == "IronMan" {
		fp, _ = os.Open(os.Getenv("END_GAME"))
		extra = 100
	}
	scanner := bufio.NewScanner(fp)
	configure(scanner)
	writer := bufio.NewWriter(wfp)
	defer func() {
		r := recover()
		if r != nil {
			fmt.Fprintln(writer, r)
		}
		writer.Flush()
	}()
	solve(scanner, writer)
	for i := 0; i < extra; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	t := getNextInt(scanner)
	for i := 0; i < t; i++ {
		testcase(scanner, writer)
	}
}
func testcase(scanner *bufio.Scanner, writer *bufio.Writer) {
	a := getNextInt(scanner)
	b := getNextInt(scanner)
	c := getNextInt(scanner)
	ans := min(upper(a, b, c), lower(a, b, c))
	if ans == math.MaxInt32 {
		ans = -1
	}
	fmt.Fprintln(writer, ans)
}
func upper(a, b, c int) int {
	if b == 1 {
		return math.MaxInt32
	}
	aa := min(a, b-1)
	cc := min(c, b-1)
	ans := a - aa + c - cc
	if aa == cc {
		if aa == 1 {
			return math.MaxInt32
		}
		ans++
	}
	return ans
}
func lower(a, b, c int) int {
	var ans int
	if a == c {
		a--
		ans++
	}
	bb := min(a-1, c-1)
	if bb < 1 {
		return math.MaxInt32
	}
	return ans + b - bb
}
func max(a, b int) int {
	if a < b {
		return b
	}
	return a
}
func min(a, b int) int {
	return -max(-a, -b)
}