Problem Description

There are some students in a class, Can you help teacher find the tallest student .

Input

There are some cases. The first line contains an integer $t$, indicate the cases; Each case have an integer $n\ ( 1 ≤ n ≤ 100 )$ , followed n students’ height.

Output

For each case output the tallest height, the height to two decimal plases;

Samples

2
3 170.00 165.00 180.00
4 165.00 182.00 172.00 160.00

180.00
182.00