Another Contest 7 Problem 1 - Lonely Users

Points: 3 (partial)

Time limit: 0.25s

Memory limit: 256M

Problem type

Ren has recently created a website, Ternary Search, which he intends on turning into the premier platform for competitive programmers to talk about anything.

In order to facilitate conversation between different users, Ren is working on a new feature called "friends". The feature will allow two distinct users to be friends. Ren is working on a prototype of this feature right now, so at present, all users are friends with Ren, and these are the only friendships present on the platform.

Including Ren, there are $N$ ~N~ users on the platform. Ren eventually wants to track a metric which he calls the "lonely user" metric, which is a count of how many users have exactly one friend. With the prototype the way it is now, how many users are lonely users?

Constraints

$1 \le T \le 10^4$ ~1 \le T \le 10^4~

$1 \le N \le 10^9$ ~1 \le N \le 10^9~

Input Specification

The first line contains a single positive integer $T$ ~T~, the number of test cases.

$T$ ~T~ lines follow, each line containing a single positive integer $N$ ~N~, the number of users presently on the platform.

Output Specification

Output $T$ ~T~ lines. On the $i$ ~i~th line, output the number of lonely users for the $i$ ~i~th test case.

Sample Input

Sample Output

0
9
99

Comments

1

Viv_CCGS commented on Oct. 27, 2021, 8:49 a.m.

Gets every test case right except the last one :(

3

justin_g_20 commented on Oct. 28, 2021, 9:18 a.m.

Think about how many friendships Ren will have