101 lines
1.8 KiB
Go
101 lines
1.8 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"log"
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"os"
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"strconv"
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"strings"
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)
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var (
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registers map[string]int
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)
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type Instr struct {
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TargetReg string
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Op string
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Var int
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CondReg string
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Cond string
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CondVal int
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}
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func (i Instr) String() string {
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return i.TargetReg + " " + i.Op + " " + strconv.Itoa(i.Var) + " if " + i.CondReg + " " + i.Cond + " " + strconv.Itoa(i.CondVal)
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}
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func main() {
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registers = make(map[string]int)
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sc := bufio.NewScanner(os.Stdin)
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for sc.Scan() {
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instr := parseLine(sc.Text())
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if cond(instr) {
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run(instr)
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}
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}
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var maxreg string
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var maxval int
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for reg, val := range registers {
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if val >= maxval {
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maxval = val
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maxreg = reg
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}
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}
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fmt.Println(registers)
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fmt.Println(maxreg)
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fmt.Println(maxval)
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}
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func cond(instr Instr) bool {
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switch instr.Cond {
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case "<":
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return registers[instr.CondReg] < instr.CondVal
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case ">":
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return registers[instr.CondReg] > instr.CondVal
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case ">=":
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return registers[instr.CondReg] >= instr.CondVal
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case "<=":
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return registers[instr.CondReg] <= instr.CondVal
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case "==":
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return registers[instr.CondReg] == instr.CondVal
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case "!=":
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return registers[instr.CondReg] != instr.CondVal
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}
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return false
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}
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func run(instr Instr) {
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switch instr.Op {
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case "inc":
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registers[instr.TargetReg] = registers[instr.TargetReg] + instr.Var
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case "dec":
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registers[instr.TargetReg] = registers[instr.TargetReg] - instr.Var
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}
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}
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func parseLine(in string) Instr {
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//fmt.Println(in)
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toks := strings.Split(in, " ")
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if len(toks) != 7 {
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log.Fatalln("Invalid instruction", in)
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}
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v, _ := strconv.Atoi(toks[2])
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c, _ := strconv.Atoi(toks[6])
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i := Instr{
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toks[0],
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toks[1],
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v,
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toks[4],
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toks[5],
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c,
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}
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//fmt.Println(i)
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if in != i.String() {
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log.Fatalln("Parse error")
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}
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return i
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}
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