func Problem_20() int {
str, _ := helpers.BigFactorial(100, nil)
sum := 0
for _, c := range str {
x, _ := strconv.Atoi(string(c))
sum += x
}
fmt.Printf("The sum of the digits in 100! is %d\n", sum)
return sum
}
func Problem_34() int {
cache := make(map[int]big.Int)
total := 0
for i := 10; i < 2540161; i++ {
str := strconv.Itoa(i)
sum := 0
for _, c := range str {
var result string
result, cache = helpers.BigFactorial(int(c-'0'), cache)
x, _ := strconv.Atoi(result)
sum += x
}
if sum == i {
total += i
}
}
fmt.Printf("The sum of all numbers which are equal to the sum of the "+
"factorial of their digits is %d\n", total)
return total
}