Minimum Cost - study code - failed to score 35, only 15, run-time error - try to figure out things in the code

minimumCost_studyCode_failedTest1.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

class Solution {
    static void Main(String[] args) {
            var line = Console.ReadLine().Split(' ');
            var prices = Console.ReadLine().Split(' ');

            List<int> loss = new List<int>();

            for (var i = 0; i < prices.Length - 1; i++)
            {
                for (var j = i + 1; j < prices.Length; j++)
                {
                    var priceI = Int32.Parse(prices[i]);
                    var priceJ = Int32.Parse(prices[j]);
                    if (priceI < priceJ) continue;

                    loss.Add(priceI - priceJ);
                }
            }

            var minLoss = loss.Min();
            
            Console.WriteLine(minLoss);
        }
}