Prof. Sergio Marquina is a mathematics teacher at the University of Spain. Whenever he comes across any good question(with complexity k), he gives that question to students within roll number range i and j.
At the start of the semester he assigns a score of 10 to every student in his class if a student submits a question of complexity k, his score gets multiplied by k.
This month he gave M questions and he is wondering what will be mean of maximum scores of all the students. He is busy planning a tour of the Bank of Spain for his students, can you help him?

-----Input:-----
- First-line will contain $T$, the number of test cases. Then the test cases follow. 
- Each test case contains the first line of input, two integers N, M i.e. Number of students in the class and number of questions given in this month.
- Next M lines contain 3 integers -i,j,k i.e. starting roll number, end roll number, and complexity of the question

-----Output:-----
- For each test case, output in a single line answer - floor value of Mean of the maximum possible score for all students.

-----Constraints-----
- $1 \leq T \leq 100$
- $1 \leq N, M \leq 105$
- $1 \leq i \leq j \leq N$
- $1 \leq k \leq 100$

-----Sample Input:-----
1
5 3
1 3 5
2 5 2
3 4 7

-----Sample Output:-----
202

-----EXPLANATION:-----
Initial score of students will be : [10,10,10,10,10]
after solving question 1 scores will be: [50,50,50,10,10]
after solving question 2 scores will be: [50,100,100,20,20]
after solving question 1 scores will be: [50,100,700,140,20]
Hence after all questions mean of maximum scores will (50+100+700+140+20)/5=202

```python

USER_FILENAME = "<user_code>"
import sys, json, builtins
import math, heapq, bisect, itertools, functools, collections, statistics, fractions, decimal, operator, array, random, re, string, os, pathlib
try:
    import resource as _res
except Exception:
    _res = None
from collections import Counter, defaultdict, deque, OrderedDict
from functools import lru_cache, reduce
from itertools import accumulate, permutations, combinations, product
from math import gcd, ceil, floor, sqrt
from decimal import Decimal
try:
    from typing import *
except Exception:
    pass
try:
    sys.setrecursionlimit(1_000_000)
except Exception:
    pass
try:
    import site as _site
    try:
        _sys_sites = _site.getsitepackages() if hasattr(_site, "getsitepackages") else []
        for _p in _sys_sites:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
    try:
        _usp = _site.getusersitepackages()
        if isinstance(_usp, str):
            _usp = [_usp]
        for _p in _usp:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
except Exception:
    pass

ns = {"__name__": "__main__"}
for _k, _v in list(globals().items()):
    if not _k.startswith("_"):
        ns[_k] = _v
_CODE = '# cook your dish here\nt=int(input())\nfor _ in range(t):\n n,m=map(int,input().split())\n a=list()\n for _ in range(n):\n  a.append(10)\n for _ in range(m):\n  i,j,k=map(int,input().split())\n  for z in range(i-1,j):\n   a[z]=a[z]*k\nprint(sum(a)//n)'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 13191