day25

solutions/day25/day25.go

@@ -0,0 +1,76 @@
+package day25
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func valueOf(r rune) int {
+	switch r {
+	case '2':
+		return 2
+	case '1':
+		return 1
+	case '0':
+		return 0
+	case '-':
+		return -1
+	case '=':
+		return -2
+	default:
+		fmt.Println("PANIC PANIC")
+		return 23489
+	}
+}
+
+func Run(filename string) {
+	file, err := os.Open(filename)
+	if err != nil {
+		fmt.Println("Error opening file:", err)
+		return
+	}
+
+	scanner := bufio.NewScanner(file)
+	scanner.Split(bufio.ScanLines)
+	runningTotal := 0
+
+	for scanner.Scan() {
+		line := []rune(scanner.Text())
+
+		current := 0
+		place := 1
+		for x := len(line) - 1; x >= 0; x-- {
+			r := line[x]
+			current += (place * valueOf(r))
+			place *= 5
+		}
+
+		fmt.Println("Coverted", line, "==>", current)
+		runningTotal += current
+	}
+	file.Close()
+
+	fmt.Println("Running total", runningTotal)
+	output := ""
+
+	for runningTotal != 0 {
+		runningTotal += 2
+		digit := runningTotal % 5
+		runningTotal /= 5
+
+		switch digit {
+		case 4:
+			output = "2" + output
+		case 3:
+			output = "1" + output
+		case 2:
+			output = "0" + output
+		case 1:
+			output = "-" + output
+		case 0:
+			output = "=" + output
+		}
+	}
+	fmt.Println("Which is", output, "in SNAFU.")
+}