#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <set>
using namespace std;

bool dfs(vector<vector<int>> &G, vector<bool> &visit, int pos){
	visit[pos] = true;
	if(pos == G.size()-1) return true;
	for(int to : G[pos]){
		if(visit[to]) continue;
		if(dfs(G,visit,to)) return true;
	}
	return false;
}

#include <cassert>

int main(){
	int n,m;
	cin >> n >> m;

	assert(m<16);
	
	vector<int> a(m),b(m),c(m);
	for(int i=0; i<m; i++){
		cin >> a[i] >> b[i] >> c[i];
	}

	double ans = 0.0;
	for(int i=0; i<(1<<m); i++){
		double tmp = 1.0;
		vector<vector<int>> G(n);
		vector<bool> visit(n,false);
		for(int j=0; j<m; j++){
			if((i>>j)&1){
				tmp *= c[j]/100.0;
				G[a[j]].push_back(b[j]);
			}else{
				tmp *= 1.0 - c[j]/100.0;
			}
		}
		if(dfs(G,visit, 0)){
			ans += tmp;
		}
	}

	printf("%.12f\n", ans);

	return 0;
}