using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        var T = int.Parse(Console.ReadLine());

        for (int h = 1; h <= T; h++)
        {
            var input = Console.ReadLine().Split().Select(int.Parse).ToArray();
            var N = input[0];
            var M = input[1];
            var K = input[2];

            var remainder = K % M;

            if (M - N <= remainder) Console.WriteLine(0);
            else Console.WriteLine(remainder);
        }
    }
}