#include <cstdio>
#include <vector>
#include <tuple>
#define repeat(i,n) for (int i = 0; (i) < (n); ++(i))
using namespace std;
int main() {
    int n, m; scanf("%d%d", &n, &m);
    vector<vector<pair<int,double> > > g(n);
    repeat (i,m) {
        int a, b, c; scanf("%d%d%d", &a, &b, &c);
        g[b].emplace_back(a, c/100.0);
    }
    double ans = 0;
    repeat (s,1<<n) if ((s&(1<<0)) and (s&(1<<(n-1)))) {
        double p = 1;
        repeat (i,n) if (i != 0) {
            double cq = 1;
            for (auto it : g[i]) {
                int j; double r; tie(j, r) = it;
                if (s&(1<<j)) {
                    cq *= 1 - r;
                }
            }
            if (s&(1<<i)) {
                p *= 1 - cq;
            } else {
                p *= cq;
            }
        }
        ans += p;
    }
    printf("%.10lf\n", ans);
    return 0;
}