test 1: runtime error: exit status 2
stderr: panic: runtime error: index out of range [0] with length 0

goroutine 1 [running]:
main.evaluate({0x0, 0x0}, 0x0)
	/tmp/build-2387339114/solution.go:54 +0x3a8
main.main()
	/tmp/build-2387339114/solution.go:152 +0x8c