You have been recently hired as a developer in CodeChef. Your first mission is to implement a feature that will determine the number of submissions that were judged late in a contest.
There are $N$ submissions, numbered $1$ through $N$. For each valid $i$, the $i$-th submission was submitted at time $S_i$ and judged at time $J_i$ (in minutes). Submitting and judging both take zero time. Please determine how many submissions received their verdicts after a delay of more than $5$ minutes.
-----Input-----
- The first line of the input contains a single integer $T$ denoting the number of test cases. The description of $T$ test cases follows.
- The first line of the input contains a single integer $N$.
- $N$ lines follow. For each valid $i$, the $i$-th of these lines contains two space-separated integers $S_i$ and $J_i$.
-----Output-----
For each test case, print a single line containing one integer — the number of submissions for which the judging was delayed by more than 5 minutes.
-----Constraints-----
- $1 \le T \le 100$
- $1 \le N \le 100$
- $1 \le S_i \le J_i \le 300$ for each valid $i$
-----Subtasks-----
Subtask #1 (100 points): original constraints
-----Example Input-----
1
5
1 3
4 4
4 10
1 11
2 7
-----Example Output-----
2
-----Explanation-----
Example case 1: The delays of the respective submissions are $2$ minutes, $0$ minutes, $6$ minutes, $10$ minutes and $5$ minutes. Only submissions $3$ and $4$ are delayed by more than $5$ minutes, hence the answer is $2$.
# cook your dish here
t=int(input());
for i in range(t):
 n=int(input());
 new=[];
 d=0;
 for i in range(n):
  s,j=list(map(int,input().split()));
  c=j-s;
  new.append(c);
 #print(new);
 for i in new:
  if i>5:
   d=d+1;
 print(d);
   
  

# cook your dish here
t=int(input());
for i in range(t):
 n=int(input());
 new=[];
 d=0;
 for i in range(n):
  s,j=list(map(int,input().split()));
  c=j-s;
  new.append(c);
 #print(new);
 for i in new:
  if i>5:
   d=d+1;
 print(d);
   
  
