reference failed: exit status 2
panic: runtime error: index out of range [600006] with length 600005

goroutine 1 [running]:
main.initComb()
	/home/ubuntu/codeforces/2000-2999/2000-2099/2060-2069/2063/2063F2.go:45 +0x2a4
main.main()
	/home/ubuntu/codeforces/2000-2999/2000-2099/2060-2069/2063/2063F2.go:180 +0x70
exit status 1