using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;

class Program
{
    public void Proc()
    {
        Reader.IsDebug = false;
        int[] inpt = Reader.ReadLine().Split(' ').Select(a=>int.Parse(a)).ToArray();
        int groupCount = inpt[0];
        int relCount = inpt[1];
        
        
        decimal[] wadai = new decimal[groupCount];
        wadai = wadai.Select(a=>-1m).ToArray();
        wadai[0] = 1;
        
        Dictionary<int, Dictionary<int, int>> dic = new Dictionary<int, Dictionary<int,int>>();
        
        for(int i=0; i<relCount; i++) {
            inpt = Reader.ReadLine().Split(' ').Select(a=>int.Parse(a)).ToArray();
            if(!dic.ContainsKey(inpt[0])) {
                dic.Add(inpt[0], new Dictionary<int,int>());
            }
            dic[inpt[0]].Add(inpt[1], inpt[2]);
        }
        Queue<int> task = new Queue<int>();
        task.Enqueue(0);
        while (task.Count > 0)
        {
            int idx = task.Dequeue();
            
            if(wadai[idx] < 0) {
                List<int> parents = dic.Where(a=>a.Value.ContainsKey(idx)).Select(b=>b.Key).ToList();
                bool canSet = true;
                parents.ForEach(a=> canSet = (canSet && wadai[a] >= 0));
                if(!canSet) {
                    task.Enqueue(idx);
                    continue;
                }
                decimal tutawaranai = 1;
                parents.ForEach((a)=>{
                   decimal tmpkakuritu = wadai[a] * dic[a][idx] / 100;
                   tutawaranai = tutawaranai * (1 - tmpkakuritu); 
                });
                wadai[idx] = (1 - tutawaranai);
            }
            if(dic.ContainsKey(idx)) {
                dic[idx].Keys.ToList().ForEach(a=>task.Enqueue(a));
            }
        }
        Console.WriteLine(wadai.Last());

    }


    public class Reader
    {
        public static bool IsDebug = true;
        private static String PlainInput = @"


5 5
0 1 30
0 2 70
1 3 20
2 4 80
3 4 90



 
";
        private static System.IO.StringReader Sr = null;
        public static string ReadLine()
        {
            if (IsDebug)
            {
                if (Sr == null)
                {
                    Sr = new System.IO.StringReader(PlainInput.Trim());
                }
                return Sr.ReadLine();
            }
            else
            {
                return Console.ReadLine();
            }
        }
    }
    static void Main()
    {
        Program prg = new Program();
        prg.Proc();
    }
}