advent2022

commit 976539c3e64f1669f59d3d094b0c95b86204113b
parent 5a957cc44406a3f48964332d7b3916f5c7b92edb
Author: bsandro <email@bsandro.tech>
Date:   Tue, 13 Dec 2022 08:14:25 +0000

Day 13 non working attempt at part 1 (sample succeedes, real input fails)

Diffstat:
A
day13/input.txt
 | 
449
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
day13/main.go
 | 
100
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
day13/sample.txt
 | 
23
+++++++++++++++++++++++

3 files changed, 572 insertions(+), 0 deletions(-)
diff --git a/day13/input.txt b/day13/input.txt
@@ -0,0 +1,449 @@
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+[[],[[[],5,[0,3,0,4,5]]],[[7],[],[6,[],[1,10,7,4]]]]
+[[[[],[4,7,3,0],[10,4,1],0],9,[7,[10,4,7,4],4]],[10,[[0,3,9,8],[10,4,8],6,[7,6,8,3,5]],[1,10],[[]]]]
+
+[[6,[1,[7,10,4]]],[[[9,4,0],3],[],9,6],[10,[[0,9,1]]],[9],[]]
+[[[[8],[5],[8,9],[8],10]],[[8,0,1,5],7],[5,4,[8,[1,1,7]]]]
+
+[[],[3,8,0],[[[3,1,10,1,9],8],2,[],10,10],[2,[1,2],2]]
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+
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+
+[[6,[[],1,8]],[4]]
+[[1],[],[4,[[5,10,2,3,4],[3,2,10,0,2],[]],[[],[]],[]],[[],[[0,6,9,6,5]],[]]]
+
+[[0],[[[3,1,6],4,7,0,8],[6,[9,9,10],[1,1]],[9],6],[]]
+[[[],[]],[2,0],[4,8,2],[[[0,3,6]]]]
+
+[[[[1],[9],2,[5,10,8,3],4],9],[[],[[1,6,8,9],2,[5,5,7],[0],8],[[1,6],[10]],[7,[]]],[],[5],[2,[],[2,[10,3,2,8],[3,8],[]]]]
+[[[8,7,[7],[9]],5,5,0],[[[5,0],[],1,10],[0,[10,6,8,2],[8,6,5,8],3],6],[[[],[4,6,8],[9,3,2,2]]],[],[8,[],[10,7,8],9]]
+
+[[2,4,6,[[8,4],[3,7,10,10,9]],[[],9,[],[2,8,10,1,5],6]],[[[10,8,10,10,7],8,6,[7,4,3,9]],[]],[1,[2,[9,3,7,9,8]],7],[0,0,[[1],[10,10]]]]
+[[[[1,2],[0],[0,1,5,6,3]],[[7,1,8],[4],6,[4,10,1,7],[7,1,6,3]]]]
+
+[[[[6,9,1,10],[10,10,4,7]],9,9,[3],7],[]]
+[[[10,[8],10,1],[[8,2,6,8],[6,3,2],0,3]],[[[5,10],[9],6],[[5,5,3],[],[10,0,4],2],[[],10,4,8],[],6],[10,[],0,[[],[2]],[7,8,2,[5,0,10]]],[5,[4,[6,0],[0,2,8,3],4,[4,9,4]],2,[[6,2],[3,2,0,3],[],8,10]]]
+
+[[],[8],[8,3],[]]
+[[],[2,[4,3,6]],[8]]
+
+[[5,[7,0,[6],9],4],[[[1,7,2],[4,4,1,10,9],[8,2,0,7],9]],[[[6,3,1,3],[7,7,4,7],[],[1],10],8],[[],[1,6],6]]
+[[],[10,3,7,3,[1]],[[3,9,[9,7,5,7]],3,[0,[0],4],4,[8]],[0]]
+
+[[8,[],5],[[[4,6,0,3,7],2],10]]
+[[[[8,4],8,[1,8,0,4,7]],[[1,8,3,7,8]],[0,4,[7,9,8,5,5]]],[[7],[3,[0,6],1,7,[9,6,1]]],[6,2],[0,9,[[7,8,2,4],4,3,8,5],6]]
+
+[[10,[3,[4,0,8,3],[2],[5,6]]],[6,[4,[6,3],5,[8,10,7]],[[],[5]]]]
+[[[[],[3]],0,[],5]]
+
+[[],[5,10]]
+[[8,[[1,9,3,8],2],[[5,3,3,4,4],[3,4,9],[8,3,6,2,6],4],0,5],[1,1,[[8,2,5]]],[2,[[5,8,0,1],8,10,[1,5,5,2]],[[],[]],[]]]
+
+[[[8,[1,2,9,8],4]],[[[9,3,1,7,7],5,[6,7,5]],6,[[1,0,10,5,2]]],[2,[5,9,5]]]
+[[10],[5],[2]]
+
+[[8,[2,[1,3],8],[4]],[6,[[1,8,1,10,8],2,[9,7],[]],9,7],[3,[4]]]
+[[[[9],[5,4,10,3],[3,4,7,2],[7]],4,4,8,4],[9,4,[[2,7,5,3]],[2,1,5],2],[],[[5,9]]]
+
+[[[],10],[3,[[4,6,10],[7,9],10,5,0],[0,7,[],0,[1,2,6]],[0],1]]
+[[[[7,8,6,9,3],3,[1]]]]
+
+[[[[2,0,2,2],[7,5,3,0],[5,7,1,9]],6,9],[10,1,[[6,7,0,5,9],2,3],[]],[[[10,10,8,8],[],[],[2,4],[6,6,3,3]]],[8,[[4,2,3,7],5,0],[10,2],[[7],[10,8,0],0],0]]
+[[[[2,10],2,[0,7,1],6],4,[[6],6,[2,9,2]]],[[[1,4,8],9,[1,0,6],[8,9,0,10,2],7],8,[[7,4,4],[10,1,6,1],5,10],5],[[],6,[[7,1],4],5],[[[2,1,4,9],[5],[8,8],[0,3,9,0,3],[9,0]],4,[1,[9,10,1],[],[3,1,3],[6,8,3,9]],6,1],[[[1],[6,5,10]],[3,0,[3,2,10],2]]]
+
+[[[[0,8,1,10,10]]],[10,[]],[[7,[3,9,5],[2,7,0],0]],[],[]]
+[[],[0,9,3,7],[],[2,8]]
+
+[[10,2,6],[[[9,7,10,6,2],7,[3,7,2]],3,3,[0,[1,1,0,9]],0],[8,5],[[6,[],4,6]]]
+[[[8,[],2,[],[6,4,8,1]],[6,7,4,[0,6],7],[],6,[9]]]
+
+[[[[0],[10],10]],[2,[[5],0,[7,3],6],[[4,9],7,4,[]],[[3,2,4,0],[],[],[3,4,7,7,1],[7,9]]],[],[[]],[[[],10,[],9],7,1]]
+[[[[3,4]],1,2,[3,[9],1,5,[3]]],[[4,[10,6,4]],10,[[7,0,3,10],9,2,[8,10,3],10],[7,3,[7,3,4],0,10],[[],[0,3],2]],[],[2,[[7,3,4],[],3,[6,1,0],2]],[[],9,[[4,8],[3,10,0]],2]]
+
+[[6,2,8,[[],7]],[],[[1],[[3,6],9,[],[6,7,8,1]],8,[[2],[0,9],9,5]],[]]
+[[[[7,7],[]],[],6],[[10,0,3,[9,6,2,4,8],[]],10,3,[[1],[7,5,8],0,[9,10,2],[0]]],[8,[[9]],1],[5,[4,2,5],9]]
+
+[[[6,[4,5,9],7,2],6],[4,2,[[9],[],[],[0,9]],2,[[0,5,4,0],6]],[],[9,3,[1],7,[2,[],4,0,3]]]
+[[8,1,[6]],[[7,7,3,[1]],1,[2,8,10,8,3],5],[[[1,9,9],2],[[7,8,6,9,5],[7,6,1],[2]],5],[3,[5,3,[10]]]]
+
+[[],[3,[[],6,[3,8,1],2,5],3,[[0,0,5],10,[]]],[]]
+[[],[[],3],[[],[]],[[[7,8,9,1],2],[[0,1,10,3,8],7]],[[[0],[],[],[4,10,3,6]],[],10,[1,[],10,[9,5,3]]]]
+
+[[],[3,[[],[0,8,1]]],[[[9,5,5],9,[10],[4],[9,1]]]]
+[[6,[[5,5,3,0],[2,7,5,5,4]]],[[8,[0,7,5,6],[7]]]]
+
+[[[5],7,[3,9,[8,0,10]]],[],[7,5],[5]]
+[[[],[],4],[0,10,[[4,4,5,6,5]],3,3]]
+
+[[3]]
+[[1,[2,8,2,4],[8,[],[8,3,9]]],[[0,[0,10,3,4,4],7,6,[]],[],9],[[7,9],[[]],1,10]]
+
+[[[[7],0],10,5,2,4],[[10,[],2],[[5,2],0,[10,6,5]],1,9]]
+[[5,7,[[10,8,2,10,8],[8,6],8,[5,1,4,5]],[],[10,[1,9]]],[[2,[5,3,2,10,6],[5,2,0,3],[6,10]],[[5,5,1,5],5,[9,3,10,6]]],[[0],7,3,[[],[],8,1,3],[10,[2,8],4,4,2]],[6],[4,3,4,[8],5]]
+
+[[[[2,6]],0,0]]
+[[[0],9,1,7]]
+
+[[8,2,10,3,2],[7,2],[[[4,9,8,3],[],[10,3],1],5,[5,[3],[4,9,4],[2,6,6,2],[5,4,10,3]]]]
+[[0,6,[3,[]]]]
+
+[[[[7,10],7],8,[],10,8],[3],[],[9,4],[[[10,5],[7,2],[6,3,8,5,8]],8,6,3]]
+[[4,0,[[10],[7],[],10,3]],[],[[[6,7],5,9,[3,3,4]],3,[],[4,10,6,2],4],[[2],[[7],[3],[3,2,10,9]],[2,6]]]
+
+[[[[9,0,2,9,6],[9],[10,3],6,[1,10,5]],[[4],5,[4,9,6,7,4]]],[[]],[1,5,[]],[5,7,9,[[],[],7],[[8,7],[0,8,4],[6,6,4,7]]],[[4,[],1],2]]
+[[3,[[8,7,3,4,7],[7],[9,6,0,2]],[4,8,[0,0,5,5],[]]],[],[7,[[0,10,2,9,2],[10],[0,1,7,9,4],10,[6,7,8,4,8]]],[]]
+
+[[],[3]]
+[[],[],[[[1],[8,8,10,9],[1,7,6]],7,[[7,5,8]],[[8,5,7,0],5,[6]]]]
+
+[[5,8],[7,5,9,10,[[8,7],8,[],4,[2]]]]
+[[],[[10,8,6,[6,9],[7,7]],[9,[5,5],2],5,[[10]]],[]]
+
+[[[[],[1,2]],[[],[9,5,5],7,8],0,3],[4,[3,1],0]]
+[[10,[[8,3,9],10]]]
+
+[[[[4,10,3,8],7,9],[],[2,1,[5,0],[4,10],3],5],[8,[[3],2,9,6],6],[],[[],[6,3,[9,10,5,8,10],5,[10,4]]]]
+[[[[],7,3]],[],[[10,[10,4],10],3]]
+
+[[[[7,6],[5,6,0,5,2],[7],1,8],6,[[10]]],[],[1,7,6,1,5],[0,[[0,5],3,[1,4],[],7],[[9,0,3]],[[9]],[[1]]]]
+[[4,[],[],[5]],[[[],[1,3,0],[10,3,5,2],2,[4,2,0,8,9]],[0,[4],[],[2,3,3]],9],[3,[1],10,5],[[],[7,5,[10,9,7],3,[]],10,[8,[]]]]
+
+[[8],[[8,[4,3],0,[2,4,10]],4,8,8],[[[2,1],9,[],[7,3,5,3,8]],6,9,10]]
+[[[[0,4,0,6]],5,[10],[[4,4,9,9],[1],[2,4,0,0]]]]
+
+[7,7,7,8]
+[7,7,7,8,9]
+
+[[[[7],[2,5],[4,1,10,9]],[[],[6,0,2,1],[0],[7,0],9],8,[6],9],[4,[],[]],[2]]
+[[7],[[6,6]]]
+
+[[10,0],[6,2,10],[[[9],7,[6,7,9,1],9,[5]],[6,3,4],[],[[7,1,4,3,9],7,[5,3]],4]]
+[[8,[],6,[7,[],[9],[8,9,5,0]]]]
+
+[[0,[5,[4,1,0,4,8],[7,5,0,4]]],[8,2],[]]
+[[[[7,4,0,6],2],[[1,0,5],5,6],[6,9,7,7,1],8],[9,[[7,3,0,10],[3,10,1,7,0],[7,9],[],[4,2]]],[2,6]]
+
+[[1,5,0],[1,[]]]
+[[],[[2]]]
+
+[[1,2],[0,[[5,9,5,0,0],10,3],7,[[10,5,5],[10,6,9,3,10],0]],[[[9,1,10],5,[0,7,5,2,10],[0,1,2,5],[2,2,6,2,9]],6,[[6,10,1,1,5],[6],4,6],1,7]]
+[[[[4,4,7]],2,[[],[0,8,3],1,7,[]],2,[2,8,[],[1],5]]]
+
+[[[],4,[7,[8,0,6,0],[1,2,6,5],[8,10,8,3,3]]],[],[[0,6,3,8,[]],9,9,1]]
+[[[],[[9,2,1],4,[]],[6,[4,10,4,3,8],[10,1,4]]],[[[1,5,7,2,0],3,[3,5,5,1],[]],3,[],2]]
+
+[[0,1]]
+[[],[[]],[9]]
+
+[[[8,[],[4,5,10,6]],[],[[7],[10],10]],[9,3,[[4,1,0,9],[0,9,8]],[6,0,8],10],[],[]]
+[[[[9,9,0,5],1,4,6,[4,9,6,10]]]]
+
+[[[1],[3,10,[3,6]],[5]],[[[],[10],[7,9,5],[],0],4,[[],10,[],2],10,[[7,1,9],7,[0,6,8],[10,4,6,9],[0]]]]
+[[[],[[],[10,9,8],[3,6,1,0],[0]],[8],[[],[8,8,7]]],[[]],[]]
+
+[[0],[[[],10,6,9,[7,8]],2,[]],[[[8,3],[6,4],[],[5,9,5,5],[2,10]],[7,4,[],8,[9,5,10]],5,[5,[6]],[]],[3,6,[[10,0,0,10],9],2,1]]
+[[0,[9,[1,0],[0,3,4,10],4,[8,1,1,8]]],[[[9,1],[0,5],[2,3,0,7]],[8,[10,9,9,4]],[[]]]]
+
+[[[[10],4],0,9,7,7]]
+[[],[[10,2,[2,2,2],5],1],[[[3],[7,3,9],9],1]]
+
+[[3,2,[[7]],2],[6,1,7,[5,[6],2,9]],[[0,[6]],[[0,4,1,7,0],[8,4,9,7,8],[],8,[3]],1],[],[]]
+[[1]]
+
+[[],[[[8,5,0,6],3],[[],[3,10],[7,1,1,9,6]]],[],[[[5,9],[2,7],[4],10,6],[7,[0,7,10,9,1],[3,0,9,2,10],8,[6,4]]],[[6,[],[0,3,8,0],2,9]]]
+[[[[7]],0,2,10,[[10,2,9]]],[1,[[],10,[8],0,[5,3,8,9,1]],[10,8,[0,9,3],1],2,[4,9]],[],[3,[[9,3,5,4],[],3,[2],[4,6]]]]
+
+[[7,5],[],[8,[[7,9,0,2,9],10,[0,8],[1,6]],5,2],[4,10,8,3],[6,8,[[8,5,7,5,1],[],[5,8]]]]
+[[],[[],[],[4,[8,9,5,8,1]],5],[[[6,4,10],[7,4,7,0]],10,1,[[0,8],5],[10,[1,1,8],2,[4,4,1],6]],[]]
+
+[[[[2,4],[9,4,8],10,5],2],[2,[[4,6,7,1],6,4,[10,8,4,2],10]],[],[[[5,0]],[[],0,[1,8,8,9,3]],9,[[10,9,2,6]]]]
+[[3,2]]
+
+[[[0,[10,1]],[[],[4,8,8,8,9]],7,[2,0,[2,6]]],[],[3,9,3],[[4],2,[[1,3,9,5,10],[6,0,5],0],[6],[2,0,[]]]]
+[[0,9]]
+
+[[10,9,[[0,10],[]],10,2],[3,2,[7,[7,4,7]],[9,[1,10],1,[7,8],[7,7,3,9,2]],8],[[[9,6,1],7,2],10],[],[[2,6,[5,0,3,7],[8,4],1],[5],[3,[8,8,1,6,1]]]]
+[[8,[1,[10]],10,[10,[],1,3],[6,3,1]],[[],5,[0,3,[9],[0,4],[3,5,10,2]]],[4],[[[1],4,[6,7],0],[[],2,[9,8,0,5]]],[[[0,4],1,[6,0,6,8],[3,1,0,6],7],[10,[7,6,1,0,10],4,[9,7,1,7,0],[]],8,1,5]]
+
+[[[[],[],[10,1],[1],[3]],[[5,5,4,3],6]],[2],[[[10,9,2,6],[4,2],1,[5,10,8,3]]],[]]
+[[[[5]],[6,[5,8]],[[2,10,6,10,2],2]],[[[5,2],4],[7,[9,10,6,8],[],10],[[4,6,4,9,1],[1,8],5,6,[7,8,0,4,7]],[],[4,7,[6,10],[4,10],[9,0,2,6,2]]]]
+
+[[],[7,[[9,10,9],0,[]]],[2,[[3,0,10,7],8,4,5],1,10,[]],[[4,1,7],[[],[],[5],[9]],[0,5,[5,1],4,[]],[[],10,1,10]],[5,[4]]]
+[[[5,0],[2,0,[],[10,6,3,0,2],[1,2,7,9]],10,0],[[[5,4],6,3],5,3,[[6,10,8,7,8],[7,6,0,3]]]]
+
+[[10,[6,[],[3],4,[7,4,0]],[[],[2,1,1]],5,5],[8,2,8,4],[[1,2,[3,3]],[[],[10,2,8]]],[2,[],2,[5,[]],7]]
+[[[[7]],2,1,[1,1,[7]]],[[7,[],[3,3,10]],[6,3,[2,0,10],[3,1,10],5],3,10],[6,9],[[[9,5],[1,8,8,7,2],10],[9,[5,3,9],[9,2,4,6]],[7,[6,9,9,0],7],10,[10,[],6]]]
+
+[[]]
+[[],[[10,[],[10,8,1],[0]]],[1],[[]],[[[4],[7,2]]]]
+
+[[[]],[7,[[10,4]],[],[8]],[[6],[[4,7],9],[7,1,7,[7,1]],8,5]]
+[[5,9],[[],6,10,1,3],[3,[8,2,[],[],[0]],7,5,5]]
+
+[[[7,10,0,[3],[]],[]],[[[3,9],[]],[[2,3,7,4]],3,[8,1,[6,6,9],[6,7,6,9,5]]],[[[5,3],9,[],3,9],[9,7],[[],[1],[],8,10],9]]
+[[6],[[[8,8,10,4,5],4,[2,5,7,2],0,[1,6]],0,[[0],3,[3,10,7,4,7],8,[5,3,2,3]],8]]
+
+[[0,[],10],[[[4,10,3,10,8],6,9,[9,8,1,4],[0]]],[[[0],[]],9,[[2,10],6]],[]]
+[[10,1,[[4,8,2,10]],10],[[],[],10,[]],[[[0],[5,1],1]]]
+
+[[],[7,[[],[3,3,1],7,[2,4,10],[]],5,6],[2],[2,1],[]]
+[[[],10,7,5,6],[],[[[7,1,10],6,2,[4],4],4,[[0,4,2]]]]
+
+[[4,[8,6],2,4],[[[9],[10,8],10]],[[[8],5,[9,7,3,1,1]],[3,9],[10,3,[],10,5]],[8]]
+[]
+
+[[[[1],[9,6],[8,0,7,9,1],[2,2,0,7]],[[7,5,0,9],8,7,[]]],[],[[[4,6,8,5,6],[],[]],[4,[8,5,6,3],5],[7,[],2,0],9],[2,9,[[0],[1],[5],[8]],8]]
+[[9,[[],2],1],[],[2,8,[10,8,0],6,3]]
+
+[[[[1,6,3,10]],4,0,4],[],[0,[],5],[],[[[2,10,8],[4,2,4,10,2],1],4,[[4,2,1,0]]]]
+[[[],[],[[0,5,1],5,[0,4,1,3],[9,7,1]],3,10],[[[0]]],[1]]
+
+[[5],[[3,10,[7,10,0],5],4],[2,[[8,10,0]],[[9,0,4],6],[]],[6,10,2,0,2]]
+[[[0,9,[7,10,9],[6],6],8,[1,[],[],[9,5,5],4],[6,[9,6,6,7]]]]
+
+[[1,8,4,2],[10,8,[9,[8,4,1,1,8],10]],[],[2,9,[5,[1,5,3],[9,3,5],8,[]],8]]
+[[6,5],[[[4,6,10,5,9],10,[10,7],5],[[8],[3,0,7,8],[10,8,5,7],[7,6,4],4],[5,10,[],6]],[7],[]]
+
+[[[[4,10,8,5],[0],8,[0],9]]]
+[[8,0,[[5,0,6,3,10]],7],[9],[[],3,0,10]]
+
+[[],[6]]
+[[8,1]]
+
+[[],[9,4]]
+[[],[[5,4,1],7],[[],4],[],[3,1,[[1],3,4,2]]]
+
+[[[[8],[6,0],0,1],4,[3,[6],1],1,1],[[[2],[3],[]],[[1,6,6,8],8,[8,6,7],[1],10],4,1,7],[[2,[4],[8],10,[10,2,7,1,9]],3,6,[4,3,[1,10,8]],[]],[[1,[9,9]],10],[8,2,[4,[8,10,5,5,2],0,[8,7,0,9]]]]
+[[[[9,8],[2,9,8,6,6]],[],[6,[0],[8,10]],5,2]]
+
+[[[1,5,[3,1],1]],[],[[9],1],[[[5,10],[]],[0,9,0]]]
+[[[9,[8,6,7,0,8],9,[4,5,3],[10,0,5]],10,[]],[]]
diff --git a/day13/main.go b/day13/main.go
@@ -0,0 +1,100 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+)
+
+func main() {
+	if len(os.Args) > 1 {
+		day13(os.Args[1])
+	} else if len(os.Args) == 1 {
+		fmt.Printf("usage: %s inputfile.txt\n", os.Args[0])
+	} else {
+		fmt.Println("No input data")
+	}
+}
+
+func day13(input_file string) {
+	fmt.Printf("day 13 input filename: %s\n", input_file)
+	input, err := os.ReadFile(input_file)
+	if err != nil {
+		log.Fatal(err)
+	}
+	pairs := strings.Split(string(input), "\n\n")
+	sum := 0
+	for i, p := range pairs {
+		pair := strings.Split(p, "\n")
+		//fmt.Printf("pair: %v\n", pair)
+		if len(pair) < 2 {
+			log.Fatal("Invalid pair", pair)
+		}
+		var p1, p2 any
+		if err = json.Unmarshal([]byte(pair[0]), &p1); err != nil {
+			log.Fatal(err)
+		}
+		if err = json.Unmarshal([]byte(pair[1]), &p2); err != nil {
+			log.Fatal(err)
+		}
+		//fmt.Printf("\n\n--- PAIR %d ---\n", i+1)
+		res, _ := Compare(p1, p2)
+		if res {
+			//fmt.Printf("Pair %d ok\n", i+1)
+			sum += i + 1
+		} else {
+			//fmt.Printf("Pair %d failed\n", i+1)
+		}
+	}
+
+	fmt.Println("Part 1:", sum)
+}
+
+// returns (result, continue)
+func Compare(p1, p2 any) (bool, bool) {
+	//fmt.Printf("Compare(%v,%v)\n", p1, p2)
+	p1ar, p2ar := IsArray(p1), IsArray(p2)
+	if p1ar && p2ar {
+		return CompareArrays(p1.([]any), p2.([]any))
+	} else if p1ar != p2ar {
+		if !p1ar {
+			return CompareArrays([]any{p1}, p2.([]any))
+		} else {
+			return CompareArrays(p1.([]any), []any{p2})
+		}
+	}
+	p1n, p2n := int(p1.(float64)), int(p2.(float64))
+	//fmt.Printf("%d <= %d = %v, continue: %v\n", p1n, p2n, p1n<=p2n, p1n==p2n)
+	return p1n <= p2n, p1n == p2n
+}
+
+func CompareArrays(p1, p2 []any) (bool, bool) {
+	//fmt.Printf("CompareArrays(%v, %v)\n", p1, p2)
+	mi := len(p1)
+	if len(p2) < mi {
+		mi = len(p2)
+	}
+	for i := 0; i < mi; i++ {
+		res, cont := Compare(p1[i], p2[i])
+		if !cont {
+			return res, false
+		}
+	}
+	return len(p1) < len(p2), true
+}
+
+func IsArray(v any) bool {
+	switch v.(type) {
+	case float64:
+		return false
+	case []any:
+		return true
+	default:
+		log.Fatal("unknown value", v)
+	}
+	return false
+}
+
+// 5660 too low
diff --git a/day13/sample.txt b/day13/sample.txt
@@ -0,0 +1,23 @@
+[1,1,3,1,1]
+[1,1,5,1,1]
+
+[[1],[2,3,4]]
+[[1],4]
+
+[9]
+[[8,7,6]]
+
+[[4,4],4,4]
+[[4,4],4,4,4]
+
+[7,7,7,7]
+[7,7,7]
+
+[]
+[3]
+
+[[[]]]
+[[]]
+
+[1,[2,[3,[4,[5,6,7]]]],8,9]
+[1,[2,[3,[4,[5,6,0]]]],8,9]