Year 2016 Day 10

Author: maneatingape

README.md

@@ -252,6 +252,7 @@ pie
 | 7 | [Internet Protocol Version 7](https://adventofcode.com/2016/day/7) | [Source](src/year2016/day07.rs) | 354 |
 | 8 | [Two-Factor Authentication](https://adventofcode.com/2016/day/8) | [Source](src/year2016/day08.rs) | 10 |
 | 9 | [Explosives in Cyberspace](https://adventofcode.com/2016/day/9) | [Source](src/year2016/day09.rs) | 6 |
+| 10 | [Balance Bots](https://adventofcode.com/2016/day/10) | [Source](src/year2016/day10.rs) | 17 |
 
 ## 2015
 

benches/benchmark.rs

@@ -73,6 +73,7 @@ mod year2016 {
     benchmark!(year2016, day07);
     benchmark!(year2016, day08);
     benchmark!(year2016, day09);
+    benchmark!(year2016, day10);
 }
 
 mod year2019 {

input/year2016/day10.txt

@@ -0,0 +1,231 @@
+bot 171 gives low to bot 4 and high to bot 84
+bot 1 gives low to bot 117 and high to bot 81
+bot 82 gives low to bot 209 and high to bot 103
+bot 128 gives low to bot 56 and high to bot 91
+value 23 goes to bot 8
+bot 7 gives low to bot 148 and high to bot 22
+bot 179 gives low to bot 91 and high to bot 77
+bot 158 gives low to bot 125 and high to bot 143
+bot 190 gives low to bot 26 and high to bot 100
+bot 32 gives low to output 12 and high to bot 6
+bot 115 gives low to bot 126 and high to bot 38
+bot 101 gives low to bot 202 and high to bot 66
+bot 143 gives low to bot 169 and high to bot 76
+bot 31 gives low to bot 109 and high to bot 95
+bot 103 gives low to bot 9 and high to bot 171
+bot 180 gives low to bot 137 and high to bot 93
+bot 73 gives low to bot 21 and high to bot 19
+bot 91 gives low to bot 18 and high to bot 58
+bot 49 gives low to bot 85 and high to bot 188
+bot 41 gives low to bot 69 and high to bot 203
+bot 10 gives low to bot 31 and high to bot 94
+bot 29 gives low to output 9 and high to bot 164
+bot 44 gives low to bot 194 and high to bot 180
+bot 157 gives low to bot 67 and high to bot 14
+bot 104 gives low to bot 114 and high to bot 149
+bot 183 gives low to bot 201 and high to bot 151
+bot 138 gives low to output 19 and high to bot 37
+bot 21 gives low to bot 98 and high to bot 205
+bot 9 gives low to bot 36 and high to bot 4
+bot 136 gives low to bot 87 and high to bot 196
+bot 99 gives low to output 20 and high to bot 96
+bot 142 gives low to bot 27 and high to bot 116
+bot 42 gives low to bot 118 and high to bot 104
+bot 108 gives low to bot 64 and high to bot 42
+value 7 goes to bot 157
+bot 159 gives low to bot 78 and high to bot 192
+bot 81 gives low to bot 124 and high to bot 3
+bot 148 gives low to bot 96 and high to bot 146
+bot 107 gives low to bot 49 and high to bot 48
+bot 38 gives low to bot 177 and high to bot 200
+value 43 goes to bot 106
+bot 28 gives low to bot 70 and high to bot 79
+bot 172 gives low to bot 106 and high to bot 190
+bot 162 gives low to bot 158 and high to bot 59
+bot 208 gives low to output 4 and high to output 13
+value 47 goes to bot 21
+bot 124 gives low to bot 79 and high to bot 83
+bot 206 gives low to bot 196 and high to bot 55
+bot 17 gives low to bot 65 and high to bot 187
+bot 144 gives low to bot 46 and high to bot 107
+bot 154 gives low to bot 195 and high to bot 78
+bot 106 gives low to bot 72 and high to bot 26
+bot 186 gives low to bot 14 and high to bot 209
+value 67 goes to bot 10
+bot 187 gives low to bot 123 and high to bot 193
+bot 5 gives low to bot 136 and high to bot 206
+bot 166 gives low to bot 61 and high to bot 85
+value 37 goes to bot 32
+bot 198 gives low to bot 76 and high to bot 71
+bot 97 gives low to output 18 and high to bot 129
+bot 139 gives low to bot 108 and high to bot 88
+bot 192 gives low to bot 131 and high to bot 89
+bot 174 gives low to bot 80 and high to bot 127
+bot 92 gives low to bot 11 and high to bot 7
+bot 94 gives low to bot 95 and high to bot 183
+value 5 goes to bot 98
+bot 72 gives low to bot 207 and high to bot 43
+bot 12 gives low to bot 68 and high to bot 195
+bot 156 gives low to bot 89 and high to bot 1
+bot 188 gives low to bot 197 and high to bot 64
+bot 3 gives low to bot 83 and high to bot 105
+bot 77 gives low to bot 58 and high to bot 41
+bot 11 gives low to bot 99 and high to bot 148
+bot 55 gives low to bot 45 and high to bot 44
+bot 66 gives low to bot 5 and high to bot 141
+bot 23 gives low to bot 48 and high to bot 139
+bot 18 gives low to bot 39 and high to bot 174
+bot 40 gives low to bot 190 and high to bot 39
+bot 90 gives low to bot 179 and high to bot 36
+bot 196 gives low to bot 92 and high to bot 45
+bot 79 gives low to bot 162 and high to bot 147
+value 2 goes to bot 172
+bot 135 gives low to bot 133 and high to bot 168
+bot 117 gives low to bot 28 and high to bot 124
+bot 118 gives low to bot 13 and high to bot 114
+bot 26 gives low to bot 43 and high to bot 12
+bot 185 gives low to bot 32 and high to bot 34
+value 61 goes to bot 207
+bot 193 gives low to bot 101 and high to bot 132
+bot 16 gives low to bot 186 and high to bot 82
+bot 93 gives low to bot 144 and high to bot 60
+bot 116 gives low to bot 155 and high to bot 57
+bot 39 gives low to bot 100 and high to bot 80
+bot 131 gives low to bot 173 and high to bot 74
+bot 133 gives low to output 11 and high to bot 20
+bot 137 gives low to bot 33 and high to bot 144
+value 11 goes to bot 52
+bot 105 gives low to bot 62 and high to bot 122
+bot 126 gives low to bot 25 and high to bot 177
+bot 78 gives low to bot 75 and high to bot 131
+bot 132 gives low to bot 66 and high to bot 167
+bot 202 gives low to bot 181 and high to bot 5
+bot 27 gives low to bot 163 and high to bot 116
+bot 173 gives low to bot 193 and high to bot 63
+value 41 goes to bot 112
+bot 13 gives low to bot 182 and high to bot 50
+bot 59 gives low to bot 143 and high to bot 198
+bot 123 gives low to bot 200 and high to bot 101
+bot 182 gives low to output 2 and high to bot 97
+bot 112 gives low to bot 8 and high to bot 15
+bot 86 gives low to bot 164 and high to bot 166
+bot 201 gives low to bot 82 and high to bot 151
+bot 62 gives low to bot 198 and high to bot 122
+bot 65 gives low to bot 38 and high to bot 123
+bot 165 gives low to bot 121 and high to bot 110
+bot 197 gives low to bot 37 and high to bot 111
+bot 69 gives low to bot 127 and high to bot 0
+bot 57 gives low to bot 81 and high to bot 3
+bot 168 gives low to bot 20 and high to bot 170
+value 31 goes to bot 31
+bot 6 gives low to output 7 and high to bot 133
+value 3 goes to bot 72
+bot 67 gives low to bot 204 and high to bot 161
+bot 35 gives low to bot 30 and high to bot 11
+bot 14 gives low to bot 161 and high to bot 90
+bot 175 gives low to bot 157 and high to bot 186
+bot 96 gives low to output 1 and high to bot 29
+bot 170 gives low to bot 51 and high to bot 176
+bot 68 gives low to bot 191 and high to bot 17
+bot 209 gives low to bot 90 and high to bot 9
+bot 150 gives low to bot 168 and high to bot 119
+bot 203 gives low to bot 0 and high to bot 27
+bot 2 gives low to output 3 and high to bot 208
+bot 50 gives low to bot 97 and high to bot 24
+bot 161 gives low to bot 128 and high to bot 179
+bot 167 gives low to bot 141 and high to bot 158
+value 73 goes to bot 112
+bot 163 gives low to bot 156 and high to bot 155
+bot 4 gives low to bot 178 and high to bot 84
+bot 147 gives low to bot 59 and high to bot 62
+bot 25 gives low to bot 135 and high to bot 150
+bot 121 gives low to bot 160 and high to bot 110
+bot 169 gives low to bot 44 and high to bot 47
+bot 75 gives low to bot 187 and high to bot 173
+bot 120 gives low to bot 176 and high to bot 87
+bot 177 gives low to bot 150 and high to bot 102
+bot 37 gives low to output 16 and high to bot 134
+bot 149 gives low to bot 24 and high to bot 130
+bot 34 gives low to bot 6 and high to bot 135
+value 71 goes to bot 109
+bot 43 gives low to bot 199 and high to bot 68
+bot 145 gives low to bot 139 and high to bot 88
+bot 84 gives low to bot 140 and high to bot 142
+bot 20 gives low to output 8 and high to bot 51
+bot 95 gives low to bot 16 and high to bot 201
+bot 61 gives low to output 5 and high to bot 138
+bot 83 gives low to bot 147 and high to bot 105
+bot 46 gives low to bot 166 and high to bot 49
+bot 153 gives low to bot 93 and high to bot 160
+bot 71 gives low to bot 152 and high to bot 165
+bot 48 gives low to bot 188 and high to bot 108
+bot 98 gives low to bot 185 and high to bot 184
+bot 70 gives low to bot 167 and high to bot 162
+bot 195 gives low to bot 17 and high to bot 75
+bot 205 gives low to bot 184 and high to bot 126
+bot 24 gives low to bot 129 and high to bot 130
+bot 60 gives low to bot 107 and high to bot 23
+bot 51 gives low to output 6 and high to bot 189
+bot 45 gives low to bot 7 and high to bot 194
+bot 164 gives low to output 0 and high to bot 61
+bot 8 gives low to bot 10 and high to bot 15
+value 19 goes to bot 67
+bot 181 gives low to bot 120 and high to bot 136
+value 13 goes to bot 204
+bot 114 gives low to bot 50 and high to bot 149
+bot 113 gives low to bot 52 and high to bot 56
+bot 30 gives low to output 14 and high to bot 99
+bot 63 gives low to bot 132 and high to bot 70
+bot 80 gives low to bot 154 and high to bot 159
+bot 53 gives low to bot 23 and high to bot 145
+bot 125 gives low to bot 55 and high to bot 169
+bot 56 gives low to bot 40 and high to bot 18
+bot 54 gives low to bot 192 and high to bot 156
+bot 155 gives low to bot 1 and high to bot 57
+bot 102 gives low to bot 119 and high to bot 181
+bot 151 gives low to bot 103 and high to bot 171
+bot 200 gives low to bot 102 and high to bot 202
+bot 0 gives low to bot 54 and high to bot 163
+bot 191 gives low to bot 115 and high to bot 65
+bot 119 gives low to bot 170 and high to bot 120
+bot 207 gives low to bot 73 and high to bot 199
+bot 184 gives low to bot 34 and high to bot 25
+value 59 goes to bot 73
+bot 130 gives low to bot 2 and high to bot 208
+bot 111 gives low to bot 134 and high to bot 13
+bot 15 gives low to bot 94 and high to bot 183
+bot 146 gives low to bot 29 and high to bot 86
+bot 58 gives low to bot 174 and high to bot 69
+bot 189 gives low to output 15 and high to bot 30
+bot 33 gives low to bot 86 and high to bot 46
+bot 100 gives low to bot 12 and high to bot 154
+bot 160 gives low to bot 60 and high to bot 53
+bot 129 gives low to output 17 and high to bot 2
+bot 87 gives low to bot 35 and high to bot 92
+bot 64 gives low to bot 111 and high to bot 118
+bot 134 gives low to output 10 and high to bot 182
+bot 122 gives low to bot 71 and high to bot 165
+bot 178 gives low to bot 41 and high to bot 140
+value 29 goes to bot 175
+bot 19 gives low to bot 205 and high to bot 115
+bot 47 gives low to bot 180 and high to bot 153
+value 17 goes to bot 113
+bot 176 gives low to bot 189 and high to bot 35
+bot 88 gives low to bot 42 and high to bot 104
+bot 199 gives low to bot 19 and high to bot 191
+value 53 goes to bot 185
+bot 22 gives low to bot 146 and high to bot 33
+bot 52 gives low to bot 172 and high to bot 40
+bot 141 gives low to bot 206 and high to bot 125
+bot 152 gives low to bot 153 and high to bot 121
+bot 140 gives low to bot 203 and high to bot 142
+bot 85 gives low to bot 138 and high to bot 197
+bot 89 gives low to bot 74 and high to bot 117
+bot 109 gives low to bot 175 and high to bot 16
+bot 36 gives low to bot 77 and high to bot 178
+bot 76 gives low to bot 47 and high to bot 152
+bot 194 gives low to bot 22 and high to bot 137
+bot 110 gives low to bot 53 and high to bot 145
+bot 74 gives low to bot 63 and high to bot 28
+bot 204 gives low to bot 113 and high to bot 128
+bot 127 gives low to bot 159 and high to bot 54

src/lib.rs

@@ -198,6 +198,7 @@ pub mod year2016 {
     pub mod day07;
     pub mod day08;
     pub mod day09;
+    pub mod day10;
 }
 
 /// # Rescue Santa from deep space with a solar system adventure.

src/main.rs

@@ -111,6 +111,7 @@ fn all_solutions() -> Vec<Solution> {
         solution!(year2016, day07),
         solution!(year2016, day08),
         solution!(year2016, day09),
+        solution!(year2016, day10),
         // 2019
         solution!(year2019, day01),
         solution!(year2019, day02),

src/year2016/day10.rs

@@ -0,0 +1,85 @@
+//! # Balance Bots
+//!
+//! Performs a [topological sort](https://en.wikipedia.org/wiki/Topological_sorting) of the bots,
+//! starting from raw values, passing through some number of bots then ending in an output.
+//!
+//! We maintain a [`VecDeque`] of chips and destinations starting with raw inputs.
+//! Once each robot receives 2 chips then its low and high outputs are added to the queue.
+//!
+//! As a minor optimization we only need to store the product of outputs 0, 1 and 2.
+use crate::util::hash::*;
+use crate::util::parse::*;
+use std::collections::VecDeque;
+
+type Input = (u32, u32);
+type Dest<'a> = (&'a str, &'a str);
+
+struct Bot<'a> {
+    low: Dest<'a>,
+    high: Dest<'a>,
+    chips: [u32; 2],
+    amount: usize,
+}
+
+pub fn parse(input: &str) -> Input {
+    let tokens: Vec<_> = input.split_ascii_whitespace().collect();
+    let mut tokens = &tokens[..];
+
+    let mut todo = VecDeque::new();
+    let mut bots = FastMap::new();
+
+    let mut part_one = u32::MAX;
+    let mut part_two = 1;
+
+    while !tokens.is_empty() {
+        if tokens[0] == "value" {
+            let value = tokens[1].unsigned();
+            let dest = (tokens[4], tokens[5]);
+
+            tokens = &tokens[6..];
+            todo.push_back((dest, value));
+        } else {
+            let key = tokens[1].unsigned();
+            let low = (tokens[5], tokens[6]);
+            let high = (tokens[10], tokens[11]);
+
+            tokens = &tokens[12..];
+            bots.insert(key, Bot { low, high, chips: [0; 2], amount: 0 });
+        }
+    }
+
+    while let Some(((kind, index), value)) = todo.pop_front() {
+        let index = index.unsigned();
+
+        if kind == "bot" {
+            bots.entry(index).and_modify(|bot| {
+                bot.chips[bot.amount] = value;
+                bot.amount += 1;
+
+                if bot.amount == 2 {
+                    let min = bot.chips[0].min(bot.chips[1]);
+                    let max = bot.chips[0].max(bot.chips[1]);
+
+                    todo.push_back((bot.low, min));
+                    todo.push_back((bot.high, max));
+
+                    if min == 17 && max == 61 {
+                        part_one = index;
+                    }
+                }
+            });
+        } else if index <= 2 {
+            part_two *= value;
+        }
+    }
+
+    (part_one, part_two)
+}
+
+pub fn part1(input: &Input) -> u32 {
+    input.0
+}
+
+pub fn part2(input: &Input) -> u32 {
+    input.1
+}

tests/test.rs

@@ -66,6 +66,7 @@ mod year2016 {
     mod day07_test;
     mod day08_test;
     mod day09_test;
+    mod day10_test;
 }
 
 mod year2019 {

tests/year2016/day10_test.rs

@@ -0,0 +1,9 @@
+#[test]
+fn part1_test() {
+    // No example data
+}
+
+#[test]
+fn part2_test() {
+    // No example data
+}