import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int q = sc.nextInt();
        int[] imos = new int[100002];
        int[] idxes = new int[q];
        int[] lefts = new int[q];
        int[] rights = new int[q];
        for (int i = 0; i < q; i++) {
            idxes[i] = sc.nextInt() - 1;
            lefts[i] = sc.nextInt();
            rights[i] = sc.nextInt();
            imos[lefts[i] + 1]++;
            imos[rights[i] + 1]--;
        }
        double[] sums = new double[100001];
        for (int i = 1; i <= 100000; i++) {
            sums[i] = sums[i - 1];
            imos[i] += imos[i - 1];
            if (imos[i] > 0) {
                sums[i] += 1.0 / imos[i];
            }
        }
        double[] ans = new double[n];
        for (int i = 0; i < q; i++) {
            ans[idxes[i]] += sums[rights[i]] - sums[lefts[i]]; 
        }
        System.out.println(String.join("\n", Arrays.stream(ans).mapToObj(String::valueOf).toArray(String[]::new)));
    }
} 
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}