days 7, 8 and 9

8/8.go

@@ -0,0 +1,93 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// cat input | go run 8.go
+
+func main() {
+
+	scanner := bufio.NewScanner(os.Stdin)
+	registers := make(map[string]int)
+	maxEverVal := 0
+
+	for scanner.Scan() {
+		s := strings.Split(scanner.Text(), " ")
+
+		register := s[0]
+		instruction := s[1]
+		data, _ := strconv.Atoi(s[2])
+		condition := s[3]
+		conditionRegister := s[4]
+		conditionTest := s[5]
+		conditionData, _ := strconv.Atoi(s[6])
+
+		_, present := registers[register]
+		if !present {
+			registers[register] = 0
+		}
+
+		_, present = registers[conditionRegister]
+		if !present {
+			registers[conditionRegister] = 0
+		}
+
+		fmt.Println(s)
+		fmt.Println(registers)
+
+		pass := false
+		if condition == "if" {
+			switch conditionTest {
+			case "==":
+				pass = registers[conditionRegister] == conditionData
+			case ">":
+				pass = registers[conditionRegister] > conditionData
+			case "<":
+				pass = registers[conditionRegister] < conditionData
+			case "<=":
+				pass = registers[conditionRegister] <= conditionData
+			case ">=":
+				pass = registers[conditionRegister] >= conditionData
+			case "!=":
+				pass = registers[conditionRegister] != conditionData
+			default:
+				fmt.Println("Condition failed!", s)
+			}
+
+			if pass {
+				switch instruction {
+				case "inc":
+					registers[register] += data
+				case "dec":
+					registers[register] -= data
+				default:
+					fmt.Println("Invalid instruction", s)
+				}
+
+				if registers[register] > maxEverVal {
+					maxEverVal = registers[register]
+				}
+			}
+
+		} else {
+			fmt.Println("Invalid condition", s)
+		}
+	}
+
+	maxVal := 0
+	maxReg := ""
+	for k, v := range registers {
+		if v > maxVal {
+			maxVal = v
+			maxReg = k
+		}
+	}
+	fmt.Println(registers)
+	fmt.Println(maxVal, maxReg, maxEverVal)
+
+}