AOC13
authorJustin Worthe <justin.worthe@entelect.co.za>
Tue, 13 Dec 2016 05:40:32 +0000 (07:40 +0200)
committerJustin Worthe <justin.worthe@entelect.co.za>
Tue, 13 Dec 2016 05:40:32 +0000 (07:40 +0200)
aoc13/Cargo.lock [new file with mode: 0644]
aoc13/Cargo.toml [new file with mode: 0644]
aoc13/src/main.rs [new file with mode: 0644]

diff --git a/aoc13/Cargo.lock b/aoc13/Cargo.lock
new file mode 100644 (file)
index 0000000..d60f2c7
--- /dev/null
@@ -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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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "kernel32-sys"
+version = "0.2.2"
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+dependencies = [
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+]
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+[[package]]
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+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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+]
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+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+]
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diff --git a/aoc13/Cargo.toml b/aoc13/Cargo.toml
new file mode 100644 (file)
index 0000000..347a1a4
--- /dev/null
@@ -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/aoc13/src/main.rs b/aoc13/src/main.rs
new file mode 100644 (file)
index 0000000..2c0e70e
--- /dev/null
@@ -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
+}