package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd:=bf.NewReader(Stdin)
	var t int
	Fscan(rd,&t)
	for ;t>0;t-- {
		var n,m,k int
		Fscan(rd,&n,&m,&k)
		Println(k%(m-n))
	}
}