re-organise repo

2022/go/day03/day03.go

@@ -0,0 +1,54 @@
+package day03
+
+import (
+	"strings"
+//	"fmt"
+
+	mapset "github.com/deckarep/golang-set/v2"
+
+)
+
+func Part1(input string) int {
+	var sum int = 0
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		c1 := []rune(line[:len(line)/2])
+		c1set := mapset.NewSet[rune](c1...)
+
+		c2 := []rune(line[len(line)/2:])
+		c2set := mapset.NewSet[rune](c2...)
+		for _, v := range c1set.Intersect(c2set).ToSlice() {
+			sum += getValue(v)
+		}
+	}
+	return sum
+}
+
+func getValue(v rune) int {
+	if v >= 'a' && v <= 'z' {
+		return int(v) - int('a') + 1
+	}
+	if v >= 'A' && v <= 'Z' {
+		return int(v) - int('A') + 27
+	}
+	return 0	
+}
+
+func Part2(input string) int {
+	var sum int = 0
+	var idx int = 0
+	lines := strings.Split(input, "\n")
+	for idx=0; idx < len(lines); idx += 3 {
+		c1 := []rune(lines[idx])
+		c1set := mapset.NewSet[rune](c1...)
+		c2 := []rune(lines[idx+1])
+		c2set := mapset.NewSet[rune](c2...)
+		c3 := []rune(lines[idx+2])
+		c3set := mapset.NewSet[rune](c3...)
+		for _, v := range c1set.Intersect(c2set).Intersect(c3set).ToSlice() {
+			sum += getValue(v)
+		}
+
+	}
+	return sum
+}