voroskoi/aoc2021 - Change CF6WHQTYNFJJF45AUBIHHMTJVZB6NVSCPNYANJFTXWGYXWO3R4AAC

Add solution for 16/2, fix parsing for real

Created by voroskoi on December 18, 2021

CF6WHQTYNFJJF45AUBIHHMTJVZB6NVSCPNYANJFTXWGYXWO3R4AAC

Dependencies

In channels

main

Change contents

Insertion in 16/main.go at line 6 [3.47]
[3.87]
[3.87]
```
	"math"
```
Insertion in 16/main.go at line 32 [3.47]
[3.422]
[3.422]
```
	log.Println(solveSecond(in))
```

Insertion in 16/main.go at line 46 [3.47]

[3.640]

}
func solveSecond(in []string) int {
	var res int
	for _, st := range in {
		var p packet
		p.parsePacket(st)
		res = p.evaluate()
	}
	return res
}
func (p packet) evaluate() int {
	switch p.typeID {
	case 0: // sum
		var sum int
		for _, subs := range p.subs {
			sum += subs.evaluate()
		}
		return sum
	case 1: // product
		var prod = 1
		for _, subs := range p.subs {
			prod *= subs.evaluate()
		}
		return prod
	case 2: // min
		var min int = math.MaxInt
		for _, subs := range p.subs {
			if subs.evaluate() < min {
				min = subs.evaluate()
			}
		}
		return min
	case 3: // max
		var max int
		for _, subs := range p.subs {
			if subs.evaluate() > max {
				max = subs.evaluate()
			}
		}
		return max
	case 4: // literal
		return int(p.number)
	case 5: // greater
		if p.subs[0].evaluate() > p.subs[1].evaluate() {
			return 1
		}
		return 0
	case 6: // less
		if p.subs[0].evaluate() < p.subs[1].evaluate() {
			return 1
		}
		return 0
	case 7: // equal
		if p.subs[0].evaluate() == p.subs[1].evaluate() {
			return 1
		}
		return 0
	default:
		log.Panicf("unknown typeID: %d", p.typeID)
		return 0
	}

Replacement in 16/main.go at line 141 [3.47]

B:BD[2.428] → [2.428:574]

		b.subs = append(b.subs, subp)
		for len(in) >= len("VVVTTTAAAAA") {
			var p packet
			in = p.parsePacket(in)
			b.subs = append(b.subs, p)
		}

[2.428]

[3.1175]

		b.subs = subp.subs

Replacement in 16/main.go at line 156 [3.47]

B:BD[3.1435] → [3.1435:1534]

		// total, err := strconv.ParseUint(in[1:16], 2, 64)
		// if err != nil {
		// 	panic(err)
		// }

[3.1435]

[3.1534]

		total, err := strconv.ParseUint(in[1:16], 2, 64)
		if err != nil {
			panic(err)
		}

Replacement in 16/main.go at line 161 [3.47]

B:BD[3.1589] → [3.1589:1619]

		in = b.parsePacket(in[16:])

[3.1589]

[3.1619]


		in = in[16:]
		inLength := len(in)
		for pivot := 0; pivot < int(total); {
			var p packet
			in = p.parsePacket(in)
			pivot = inLength - len(in)
			b.subs = append(b.subs, p)
		}

Replacement in 16/main.go at line 172 [3.47]

B:BD[3.1628] → [3.1628:1854]

		// log.Println("subpackets:", in[1:12])
		// subpackets, err := strconv.ParseInt(in[1:12], 2, 8)
		// if err != nil {
		// 	panic(err)
		// }
		// log.Println("numer of subpackets", subpackets)
		in = b.parsePacket(in[12:])

[3.1628]

[3.1854]

		subpackets, err := strconv.ParseInt(in[1:12], 2, 8)
		if err != nil {
			panic(err)
		}
		// log.Println("number of subpackets", subpackets)
		in = in[12:]
		for counter := 0; counter < int(subpackets); counter++ {
			var p packet
			in = p.parsePacket(in)
			b.subs = append(b.subs, p)
		}