03. Miner Task

using System;
using System.Collections.Generic;

namespace _03._Miner_Task
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, int> materialsQuantity = new Dictionary<string, int>();
            //материал -> количество
            while (true)
            {
                string material = Console.ReadLine();
                if (material == "stop")
                {
                    break;
                }
                //валиден материал
                int quantity = int.Parse(Console.ReadLine());

                if (!materialsQuantity.ContainsKey(material))
                {
                    //нямаме до момента такъв материал
                    materialsQuantity.Add(material, quantity);
                }
                else
                {
                    //имаме такъв материал
                    int currentQuantity = materialsQuantity[material];
                    materialsQuantity[material] = currentQuantity + quantity;
                }

            }

            foreach (KeyValuePair<string, int> record in materialsQuantity)
            {
                //{resource} –> {quantity}
                Console.WriteLine(record.Key + " -> " + record.Value);
            }
        }
    }
}