Обсуждение @ 1194. Рукопожатия @ Timus Online Judge

Locomotive Very Very Very Simple [4] // Задача 1194. Рукопожатия 8 янв 2003 14:45

every body handshakes all else his couple
so
n*(n-1) div 2
-
k (couples doesnt handshake eachother)!
-->

Var
n,k:integer;
begin
readln(n,k);
writeln(((n*(n-1)) div 2) -k);
end.

Aidin_n7

Koala it's not right to post the accepted program. // Задача 1194. Рукопожатия 23 авг 2003 16:40

Caesar11 Re: Very Very Very Simple // Задача 1194. Рукопожатия 4 ноя 2011 09:21

n(n-1)/2-k。。。

BillSu Re: Very Very Very Simple // Задача 1194. Рукопожатия 27 апр 2014 10:30

What is The Autor Thinking?
What's the meaning of the spliting group numbers?
It just piss me off.

bstu_student Re: Very Very Very Simple // Задача 1194. Рукопожатия 6 авг 2019 04:13

Yep, this is the one way for solution.

I've met problem like that earlier. Statements consist kinda "you need to get very-very much operation with binary code of number", but after some tests we understood, that solution was kinda "ans = n*(-1)".

And it's good to have a short cut in problems for clever men;)

Обсуждение задачи 1194. Рукопожатия