#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;

int N,M;
double rr[21][21];
int yes[21];

using namespace std;

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

  cin >> N >> M;

  REP(i,M){
    int a,b,c;
    cin >> a >> b >> c;
    rr[a][b] = c / 100.0;
  }

  double ans = 0.0;

  for(int mask=0; mask<1<<N; mask++){
    REP(i,N){ yes[i] = (mask >> i) & 1; }
    if(yes[0] == 0 || yes[N-1] == 0) continue;

    double p = 1.0;
    FOR(i,1,N){
      double p_i = 1.0;
      REP(j,N){ if(yes[j] && rr[j][i]) p_i*=(1.0 - rr[j][i]); }
      if(yes[i]) p*=1.0-p_i;
      else p*=p_i;
    }
    ans += p;
  }

  cout << setprecision(12) << fixed;
  cout << ans << endl;

  return 0;
}