C# 2.2.Miner_Task

using System;
using System.Collections.Generic;

namespace _2._2.Miner_Task
{
    class Program
    {
        static void Main()
        {
            Dictionary<string, int> repository = new Dictionary<string, int>();

            string resource;
            while ((resource = Console.ReadLine()) != "stop")
            {
                int quantity = int.Parse(Console.ReadLine());

                if (!repository.ContainsKey(resource))
                {
                    // repository.Add(resource, 0);
                    repository[resource] = 0;
                }
                repository[resource] += quantity;
            }

            foreach (var item in repository)
            {
                Console.WriteLine($"{item.Key} -> {item.Value}");
            }
        }
    }
}