using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var ans = new int[t];
        for (var u = 0; u < t; ++u)
        {
            var c = NList;
            var (n, m, k) = (c[0], c[1], c[2]);
            var tmp = k % m;
            ans[u] = tmp < (m - n) ? tmp : 0;
        }
        WriteLine(string.Join("\n", ans));
    }
}