lines

John has several lines. The lines are covered on the X axis. Let A is a point which is covered by the most lines. John wants to know how many lines cover A.

The first line contains a single integer $T(1 \leq T \leq 100)$(the data for $N > 100$ less than 11 cases),indicating the number of test cases.
Each test case begins with an integer $N(1 \leq N \leq 10^5)$,indicating the number of lines.
Next N lines contains two integers $X_i$ and $Y_i(1 \leq X_i \leq Y_i \leq 10^9)$,describing a line.

For each case, output an integer means how many lines cover A.

2
5
1 2 
2 2
2 4
3 4
5 1000
5
1 1
2 2
3 3
4 4
5 5

3
1

BestCoder Round #20