EqualPairs04

using System;
using System.Linq;

namespace EqualPairs04_experiments
{
    class Program
    {
        static void Main(string[] args)
        {
            int f = 0; int s = 0; int firstSum = 0; int secondSum = 0; int maxDif = 0; bool equal = true;
            int n = int.Parse(Console.ReadLine());
            for (int i = 0; i < n; i++)
            {
                for (int j = i+1; j < n+1; j++)
                {
                    secondSum = f + s;
                }
                f = int.Parse(Console.ReadLine());
                s = int.Parse(Console.ReadLine());
                firstSum = f + s;
                if (firstSum == secondSum)
                {
                    equal = true;
                }
                else
                {
                    equal = false;
                    maxDif = Math.Abs(firstSum - secondSum);
                }
            }
            if (equal || n <2)
            {
                Console.WriteLine($"Yes, value={firstSum}");
            }
            else
            {
                Console.WriteLine($"No, maxdiff={maxDif}");
            }
        }
    }
}