panic: runtime error: index out of range [1] with length 1

goroutine 1 [running]:
main.solve(0x3, {0x12b988?, 0x4000072ec0?})
	/home/ubuntu/codeforces/1000-1999/1200-1299/1280-1289/1280/verifierA.go:19 +0x368
main.main()
	/home/ubuntu/codeforces/1000-1999/1200-1299/1280-1289/1280/verifierA.go:62 +0x1d0
exit status 2