#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  using LD = long double;
  int n, q;
  cin >> n >> q;
  constexpr int M = 100010;
  VI c(M);
  vector<tuple<int, int, int>> qs(q);
  for(auto& [i, s, t] : qs) {
    cin >> i >> s >> t;
    i--;
    c[s]++, c[t]--;
  }
  rep(i, M - 1) c[i + 1] += c[i];
  vector<LD> s(M + 1);
  rep(i, M) {
    s[i+1] = s[i];
    if (c[i]) s[i+1] += LD(1) / c[i];
  }
  vector<LD> ans(n);
  for(auto [i, si, ti] : qs) ans[i] += s[ti] - s[si];
  cout << fixed << setprecision(12);
  for(auto x : ans) cout << x << '\n';
}