package p01

import (
	"fmt"
	"common"
)

// --- Day 1: Inverse Captcha ---
// http://adventofcode.com/2017/day/1
func Solve(input string) (string, string) {
	return solve(input, 1), solve(input, len(input)/2)
}

func solve(input string, lookahead int) string {
	sum := 0
	for i := 0; i < len(input); i += 1 {
		if input[i] == input[(i+lookahead)%len(input)] {
			sum += int(common.ToIntOrPanic(string(input[i])))
		}
	}
	return fmt.Sprintf("%d", sum)
}

package p01

import (
	"fmt"
	"common"
)

func Solve(input string) (string, string) {
	return solve(input, 1), solve(input, len(input)/2)
}

func solve(input string, lookahead int) string {
	sum := 0
	for i := 0; i < len(input); i += 1 {
		if input[i] == input[(i+lookahead)%len(input)] {
			sum += int(common.ToIntOrPanic(string(input[i])))
		}
	}
	return fmt.Sprintf("%d", sum)
}

--- 
+++ 
@@ -5,6 +5,8 @@
 	"common"
 )
 
+// --- Day 1: Inverse Captcha ---
+// http://adventofcode.com/2017/day/1
 func Solve(input string) (string, string) {
 	return solve(input, 1), solve(input, len(input)/2)
 }
Add link to puzzle to code.
