MathDB

2015 F3 E1

Part of MBMT Team Rounds

Problems(1)

MBMT Team -- Fermat #3/Euler #1

Source:

3/29/2015
Compute 1−2+3−4+⋯+2013−2014+20151 - 2 + 3 - 4 + \dots + 2013 - 2014 + 2015.