I use the Go programming language and when doing the ASCII Art puzzle the variable H would always be 0.
Changing:
scanner.Scan()
fmt.Sscan(scanner.Text(),&L, &H)
To:
scanner.Scan()
fmt.Sscan(scanner.Text(), &L)
scanner.Scan()
fmt.Sscan(scanner.Text(), &H)
Seems to do the trick.