Problem #22

Problem link
Solution:

package main

import (
    "io/ioutil"
    "strings"
    "sort"
)

func main() {
    fileBuf, err := ioutil.ReadFile("022_input.txt")
    if err != nil {
        panic(err.String())
    }
    fileStr := string(fileBuf)
    arr := strings.Split(fileStr, ",", -1)
    for i := range arr {
        arr[i] = strings.Split(arr[i], "\"", -1)[1]
    }

    sort.SortStrings(arr)

    result := uint64(0)
    for i := range arr {
        result += uint64(i+1) * uint64(alphabeticValue(arr[i]))
    }
    println(result)
}

func alphabeticValue(in string) int {
    sum := 0
    for i := range in {
        sum += int(in[i]) - int('A') + 1
    }
    return sum
}

Result: 871198282
Time: 0m0.035s