case 2 failed: runtime error: exit status 2
panic: runtime error: index out of range [-1]

goroutine 1 [running]:
main.main()
	/tmp/cf-worker-1684908473/main.go:160 +0xf14

input:
8
10 1 9 5 6 4 5
8 9 10 4 5 9 2
4 3 8 10 3 1 5
5 9 8 4 1 2 1
6 4 10 3 5 2 7
7 1 7 10 7 1 5
5 8 3 1 7 2 3
7 7 9 5 6 4 7