#!/bin/python3

import sys

def profit(a, b, c):
    val1 = b - a
    p = (c + val1) - 2*b
    return abs(p)

if __name__ == "__main__":
    t = int(input().strip())
    for a0 in range(t):
        a, b, c = input().strip().split(' ')
        a, b, c = [int(a), int(b), int(c)]
        result = profit(a, b, c)
        print(result)