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-rw-r--r--2016/aoc13/Cargo.lock98
-rw-r--r--2016/aoc13/Cargo.toml7
-rw-r--r--2016/aoc13/src/main.rs64
3 files changed, 169 insertions, 0 deletions
diff --git a/2016/aoc13/Cargo.lock b/2016/aoc13/Cargo.lock
new file mode 100644
index 0000000..d60f2c7
--- /dev/null
+++ b/2016/aoc13/Cargo.lock
@@ -0,0 +1,98 @@
+[root]
+name = "aoc13"
+version = "0.1.0"
+dependencies = [
+ "regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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+]
+
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+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/2016/aoc13/Cargo.toml b/2016/aoc13/Cargo.toml
new file mode 100644
index 0000000..347a1a4
--- /dev/null
+++ b/2016/aoc13/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "aoc13"
+version = "0.1.0"
+authors = ["Justin Worthe <justin.worthe@entelect.co.za>"]
+
+[dependencies]
+regex = "0.1" \ No newline at end of file
diff --git a/2016/aoc13/src/main.rs b/2016/aoc13/src/main.rs
new file mode 100644
index 0000000..2c0e70e
--- /dev/null
+++ b/2016/aoc13/src/main.rs
@@ -0,0 +1,64 @@
+extern crate regex;
+use regex::Regex;
+
+use std::io::BufReader;
+use std::io::prelude::*;
+use std::fs::File;
+use std::collections::HashMap;
+
+fn main() {
+ //let target = (7, 4);
+ let target = (31,39);
+
+ let mut states: HashMap<(i32, i32), u32> = HashMap::new();
+ states.insert((1, 1), 0);
+ let mut moves = 0;
+ while moves < 50 {
+/* if states.iter().any(|(&state, _)| state == target) {
+ break;
+ }
+*/
+ let new_states: Vec<(i32, i32)> = states.iter().filter(|&(_, &x)| x == moves).flat_map(|(state, _)| available_steps(state)).collect();
+
+ moves += 1;
+
+ for state in new_states {
+ if !states.contains_key(&state) {
+ states.insert(state, moves);
+ }
+ }
+ }
+
+ println!("Moves required: {}", moves);
+ println!("Possible destinations: {}", states.iter().count());
+}
+
+
+fn available_steps(current: &(i32, i32)) -> Vec<(i32, i32)> {
+ let &(x0, y0) = current;
+ let mut results = Vec::new();
+ for &(x, y) in [(x0-1, y0), (x0+1, y0), (x0, y0-1), (x0, y0+1)].iter() {
+ if x >= 0 && y >= 0 && !is_wall(x, y) {
+ results.push((x, y));
+ }
+ }
+ results
+}
+
+fn print_map() {
+ for y in 0..10 {
+ for x in 0..10 {
+ print!("{}", if is_wall(x, y) {'#'} else {'.'});
+ }
+ println!("");
+ }
+}
+
+fn is_wall(x: i32, y: i32) -> bool {
+// let favourite_number = 10;
+ let favourite_number = 1352;
+ let funny_num = x*x + 3*x + 2*x*y + y + y*y + favourite_number;
+ let bin = format!("{:b}", funny_num);
+ let number_of_ones = bin.chars().filter(|&c| c == '1').count();
+ number_of_ones % 2 == 1
+}