# Data Structure?

Time Limit: 10000/5000 MS (Java/Others)

Memory Limit: 65536/65536 K (Java/Others)

## Description

Data structure is one of the basic skills for Computer Science students, which is a particular way of storing and organizing data in a computer so that it can be used efficiently. Today let me introduce a data-structure-like problem for you.
Original, there are N numbers, namely 1, 2, 3...N. Each round, iSea find out the Ki-th smallest number and take it away, your task is reporting him the total sum of the numbers he has taken away.

## Input

The first line contains a single integer T, indicating the number of test cases.
Each test case includes two integers N, K, K indicates the round numbers. Then a line with K numbers following, indicating in i (1-based) round, iSea take away the Ki-th smallest away.

Technical Specification
1. 1 <= T <= 128
2. 1 <= K <= N <= 262 144
3. 1 <= Ki <= N - i + 1

## Output

For each test case, output the case number first, then the sum.

## Sample Input

2
3 2
1 1
10 3
3 9 1

## Sample Output

Case 1: 3
Case 2: 14

lcy