#include <bits/stdc++.h>
#define FOR(i,a,b)    for (int i=(a)  ;i<(b) ;i++)
#define RFOR(i,a,b)   for (int i=(b)-1;i>=(a);i--)
#define REP(i,n)      for (int i=0    ;i<(n) ;i++)
#define RREP(i,n)     for (int i=(n)-1;i>=0  ;i--)
#define ALL(a)        (a).begin(),  (a).end()
#define RALL(a)       (a).rbegin(), (a).rend()

const int MOD = 1e9 + 7;
const int INF = 1 << 29;
const double EPS = 1e-10;

using namespace std;

int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);

  int n,m;
  cin >> n >> m;
  vector<float> p(n,1.0);

  p[0] = 0.0;

  REP(i,m){
    int a,b,c;
    cin >> a >> b >> c;
    p[b] *= 1.0 - (1.0 - p[a])*(c / 100.0);
    //cout << p[b] << endl;
  }

  REP(i,n){
    //cout << p[i] << endl;
  }

  cout << (1.0 - p[n-1]) << endl;

  return 0;
}