#include <bits/stdc++.h>
using namespace std;
#define rep(i, a) for (int i = 0; i < (a); i++)
#define rep2(i, a, b) for (int i = (a); i < (b); i++)
#define repr(i, a) for (int i = (a) - 1; i >= 0; i--)
#define repr2(i, a, b) for (int i = (b) - 1; i >= (a); i--)
template<class T1, class T2> bool chmin(T1 &a, T2 b) { return b < a && (a = b, true); }
template<class T1, class T2> bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
typedef long long ll;

double g[20][20];

int main() {
	int n, m;
	cin >> n >> m;
	rep(i, m) {
		int a, b, c;
		cin >> a >> b >> c;
		g[a][b] = c / 100.0;
	}

	double ans = 0;

	rep(i, 1 << n) if ((i & 1 << 0) && (i & 1 << (n - 1))) {
		double pr = 1;
		rep2(to, 1, n) {
			double q = 1;
			rep(fr, n) if (i & 1 << fr) {
				q *= 1 - g[fr][to];
			}
			if (i & 1 << to) pr *= 1 - q;
			else pr *= q;
		}
		ans += pr;
	}

	printf("%.20f\n", ans);
	return 0;
}