panic: runtime error: integer divide by zero

goroutine 1 [running]:
main.solveCase(0xc9dc0?, 0x400000f908?, 0xc9dc0?, 0x400000f910?)
	/tmp/cf-worker-2359889803/verifierE.go:74 +0x334
main.solveAll({0x4000114000, 0xc8, 0xc9c80?})
	/tmp/cf-worker-2359889803/verifierE.go:146 +0x60
main.main()
	/tmp/cf-worker-2359889803/verifierE.go:161 +0xc8