Handshake
問題
At the annual meeting of Board of Directors of Biana Inc, every one starts shaking hands with everyone else in the room. Given the fact that any two persons shake hand exactly once, Can you tell the total count of handshakes?
Input Format
The first line contains the number of test cases T, T lines follow. Each line then contains an integer N, the total number of Board of Directors of Acme.
Output Format
Print the number of handshakes for each test-case in a new line.
Constraints
1 <= T <= 1000 0 < N < 10^6
実行速度: 5
メモリ制限: 256
ソース制限:
説明
Case 1 : The lonely board member shakes no hands, hence 0. Case 2 : There are 2 board members, 1 handshake takes place.
