@book{44833,
	author = {Halim, Steven. and Halim, Felix},
	title = {Competitive programming 4 :},
	publisher = {Ingram content group,},
	year = {2020.},
	address = {United States, UK :},
	note = {Cover title
Book 1, chapter 1-4; Book 2, chapter 5-9
Handbook for IOI and ICPC contestants, and for Computer science enthusiast.}
}