func main() {
i := new(big.Int)
// 2^1000 == 1 << 1000
i.SetString("1", 10)
i.Lsh(i, 1000)
fmt.Println(misc.DigitSum(i))
}
func main() {
fmt.Println(misc.DigitSum(factorial(big.NewInt(100))))
}
func main() {
i := new(big.Int)
// 2^1000 == 1 << 1000
i.SetString("1", 10)
i.Lsh(i, 1000)
fmt.Println(misc.DigitSum(i))
}
func main() {
fmt.Println(misc.DigitSum(factorial(big.NewInt(100))))
}