# Practice on Toph

Participate in exhilarating programming contests, solve unique algorithm and data structure challenges and be a part of an awesome community.

Participate in exhilarating programming contests, solve unique algorithm and data structure challenges and be a part of an awesome community.

Little Dwayne Johnson is hosting a programming contest. A lot of teams mail him everyday to ask about various things. Little Dwayne uses Kmail to send reply mails. But Kmail only allows sending **K** mails per day. If some teams don’t get any reply they become dissatisfied.

Little Dwayne forgets everything after each day. So if a team mailed him on * ith* day, he will not reply them after

First line contains the number of test cases **T (1 ≤ T ≤ 100)**. Each test case starts with two integers **D** and **K (1 ≤ D ≤ 100, 0 ≤ K ≤ 100)**, where **D** is the number of days to consider and **K** is the maximum number of mails little Dwayne can send per day. Next line contains **D** integers where **i**th integer, **a _{i} (0 ≤ a_{i} ≤ 100)** denotes the number of mails little Dwayne received on

For each test case print the number of dissatisfied teams.

Input | Output |
---|---|

1 3 10 12 5 14 | 6 |

In the sample, little Dwayne can send reply to at most 10 teams on first day. So 2 teams are dissatisfied. On second day no teams are dissatisfied. On third day 4 teams are dissatisfied. So total 6 teams are dissatisfied.

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