Solution.cs

using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Text.RegularExpressions;
using System.Text;
using System;

class Solution {

    // Complete the saveThePrisoner function below.
    static int saveThePrisoner(int n, int m, int s) {
        var prisonerIndex = (s-1+m)%n; //-1 for 0indexing
        return prisonerIndex > 0 ? prisonerIndex : n;
    }

    static void Main(string[] args) {
        TextWriter textWriter = new StreamWriter(@System.Environment.GetEnvironmentVariable("OUTPUT_PATH"), true);

        int t = Convert.ToInt32(Console.ReadLine());

        for (int tItr = 0; tItr < t; tItr++) {
            string[] nms = Console.ReadLine().Split(' ');

            int n = Convert.ToInt32(nms[0]);

            int m = Convert.ToInt32(nms[1]);

            int s = Convert.ToInt32(nms[2]);

            int result = saveThePrisoner(n, m, s);

            textWriter.WriteLine(result);
        }

        textWriter.Flush();
        textWriter.Close();
    }
}