n, q = map(int, input().split())
a = [0] * 100001
p = [[] for _ in range(n)]
for _ in range(q):
	i, s, t = map(int, input().split())
	a[s] += 1
	a[t] -= 1
	p[i - 1].append((s, t))
for t in range(100000):
	a[t + 1] += a[t]
for t in range(100001):
	if a[t]:
		a[t] = 1 / a[t]
for t in range(100000):
	a[t + 1] += a[t]
for i in p:
	ans = 0
	for s, t in i:
		ans += a[t - 1]
		if s:
			ans -= a[s - 1]
	print(ans)