diff --git a/2016/day01/Cargo.lock b/2016/day01/Cargo.lock
new file mode 100644
index 0000000..dc220d4
--- /dev/null
+++ b/2016/day01/Cargo.lock
@@ -0,0 +1,4 @@
+[root]
+name = "day01"
+version = "0.1.0"
+
diff --git a/2016/day03/Cargo.lock b/2016/day03/Cargo.lock
new file mode 100644
index 0000000..92044de
--- /dev/null
+++ b/2016/day03/Cargo.lock
@@ -0,0 +1,4 @@
+[root]
+name = "day03"
+version = "0.1.0"
+
diff --git a/2016/day03/Cargo.toml b/2016/day03/Cargo.toml
new file mode 100644
index 0000000..c341d27
--- /dev/null
+++ b/2016/day03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "day03"
+version = "0.1.0"
+authors = ["~krowbar"]
+
+[dependencies]
diff --git a/2016/day03/src/main.rs b/2016/day03/src/main.rs
new file mode 100644
index 0000000..a18ce91
--- /dev/null
+++ b/2016/day03/src/main.rs
@@ -0,0 +1,27 @@
+use std::io::Read;
+use std::fs::File;
+
+fn part_1(input: &String) {
+    let total = input.lines()
+        .map(|l| l
+            .trim()
+            .split_whitespace()
+            .map(|v| v.parse::<i32>().unwrap())
+            .collect::<Vec<_>>())
+        .filter(|v| v.iter().fold(0, |sum, x| sum + x) > 2 * v.iter().max().unwrap() )
+        .collect::<Vec<_>>()
+        .len();
+    println!("Part 1: Total was {}", total);
+}
+
+fn part_2(input: &String) {
+    ;
+}
+
+fn main() {
+    let mut file = File::open("./data").expect("could not open file");
+    let mut input = String::new();
+    file.read_to_string(&mut input).expect("could not read file");
+
+    part_1(&input);
+}
diff --git a/2016/day04/Cargo.lock b/2016/day04/Cargo.lock
new file mode 100644
index 0000000..e5d2c17
--- /dev/null
+++ b/2016/day04/Cargo.lock
@@ -0,0 +1,98 @@
+[root]
+name = "day04"
+version = "0.1.0"
+dependencies = [
+ "regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "aho-corasick"
+version = "0.5.3"
+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"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "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"
+
+[[package]]
+name = "memchr"
+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)",
+]
+
+[[package]]
+name = "regex"
+version = "0.1.80"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "thread-id"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thread_local"
+version = "0.2.7"
+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)",
+]
+
+[[package]]
+name = "utf8-ranges"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum aho-corasick 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ca972c2ea5f742bfce5687b9aef75506a764f61d37f8f649047846a9686ddb66"
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diff --git a/2016/day04/Cargo.toml b/2016/day04/Cargo.toml
new file mode 100644
index 0000000..dfc913d
--- /dev/null
+++ b/2016/day04/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "day04"
+version = "0.1.0"
+authors = ["~krowbar"]
+
+[dependencies]
+regex = "0.1"
\ No newline at end of file
diff --git a/2016/day04/src/main.rs b/2016/day04/src/main.rs
new file mode 100644
index 0000000..d41d782
--- /dev/null
+++ b/2016/day04/src/main.rs
@@ -0,0 +1,74 @@
+extern crate regex;
+
+use std::io::Read;
+use std::fs::File;
+use regex::Regex;
+use std::collections::HashMap;
+
+///// THIS IS NOT WORKING RIGHT. :(
+
+// fn get_lines(input: &String) {
+//     let lines: Vec<(&String, i32, &String)> = vec![];
+//     lines.push(("Foo", 42, "bar"));
+//     return lines;
+// }
+
+// fn part_1(input: &Vec<(String, i32, String)>) {
+//     println!("Started part 1");
+// }
+
+#[derive(Debug)]
+struct Room {
+    name: String,
+    sector: i32,
+    check: String,
+}
+
+fn part_1(input: &String) {
+    let re = Regex::new(r"([a-z\\-]+)-([:digit:]+)\[([:lower:]+)\]").unwrap();
+
+    let sum = 0;
+    for cap in re.captures_iter(input) {
+        let room = Room {   name: String::from(cap.at(1).unwrap_or("")),
+                            sector: cap.at(2).unwrap_or("0").parse().unwrap_or(0),
+                            check: String::from(cap.at(3).unwrap_or("")),
+                        };
+        let mut charMap: HashMap<char, i32> = HashMap::new();
+        for ch in room.name.replace("-", "").chars() {
+            let l = charMap.entry(ch).or_insert(0);
+            *l += 1;
+        }
+        println!("{:?}", charMap);
+        //println!("{:?}", room);
+        //let mut letters: Vec<char> = .collect();
+        //println!("{:?}", letters.sort());
+    }
+    println!("Part 1: Total sum of valid rooms is {}", sum);
+
+    // let sum = input
+    // .lines()
+    // .map(|l|
+    //     re.captures(l).unwrap()
+    //     //.split(&re)
+    //     //.map(|&v| Room { name: v[0] + v[1] + v[2], sector: v[3].parse::<i32>().unwrap(), checksum: v[4] })
+    //     //.collect::<Vec<_>>()
+    //     //.turn into collection of items
+    //     //.collect
+    //     )
+    // .map(|c| c.at(0))
+    // .collect::<Vec<_>>()
+    // // //.filter out decoy rooms
+    // // //.collect
+    // // //.fold and sum the sectors
+    // // //.unwrap?
+    //  .len();
+    // println!("Part 1: Sum was {}", sum);
+}
+
+fn main() {
+    let mut file = File::open("./data").expect("could not open file");
+    let mut input = String::new();
+    file.read_to_string(&mut input).expect("could not read file");
+
+    part_1(&input);
+}
diff --git a/2016/day05/Cargo.lock b/2016/day05/Cargo.lock
new file mode 100644
index 0000000..865b7bf
--- /dev/null
+++ b/2016/day05/Cargo.lock
@@ -0,0 +1,81 @@
+[root]
+name = "day05"
+version = "0.1.0"
+dependencies = [
+ "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "gcc"
+version = "0.3.39"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "kernel32-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "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"
+
+[[package]]
+name = "rand"
+version = "0.3.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rust-crypto"
+version = "0.2.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "gcc 0.3.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rustc-serialize"
+version = "0.3.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "time"
+version = "0.1.35"
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+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum gcc 0.3.39 (registry+https://github.com/rust-lang/crates.io-index)" = "771e4a97ff6f237cf0f7d5f5102f6e28bb9743814b6198d684da5c58b76c11e0"
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diff --git a/2016/day05/Cargo.toml b/2016/day05/Cargo.toml
new file mode 100644
index 0000000..f0dac23
--- /dev/null
+++ b/2016/day05/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "day05"
+version = "0.1.0"
+authors = ["~krowbar"]
+
+[dependencies]
+rust-crypto = "^0.2"
\ No newline at end of file
diff --git a/2016/day05/src/main.rs b/2016/day05/src/main.rs
new file mode 100644
index 0000000..7a3871e
--- /dev/null
+++ b/2016/day05/src/main.rs
@@ -0,0 +1,79 @@
+extern crate crypto;
+
+use crypto::md5::Md5;
+use crypto::digest::Digest;
+
+//This was mostly stolen from a github gist that I found while looking for a Rust MD5 library
+fn part_1() {
+    let mut hasher = Md5::new();
+
+    let key = "reyedfim".as_bytes();
+    let mut answer: Vec<u8> = vec![];
+
+    let mut count = 8;
+    for i in 0..std::u64::MAX {
+        hasher.input(key);
+        hasher.input(i.to_string().as_bytes());
+
+        let mut output = [0; 16]; //represents MD5 string
+        hasher.result(&mut output);
+
+        //check the first two and a half bytes of the output
+        let first_five = output[0] as i32 + output[1] as i32 + (output[2] >> 4) as i32;
+        if first_five == 0 {
+            let output_str: String = output.iter().map(|&c| format!("{:x}{:x}", c >> 4, c)).collect();
+            println!("hashed {} to get {}", i, output_str);
+            answer.push(output[2]);
+            match count > 1 {
+                true => count -= 1,
+                false => break,
+            }
+        }
+        hasher.reset();
+    }
+    let answer_str: String = answer.iter().map(|&c| format!("{:x}", c)).collect();
+    println!("Part 1: Answer is {}", answer_str);
+}
+
+fn part_2() {
+    let mut hasher = Md5::new();
+
+    let key = "reyedfim".as_bytes();
+    let mut answer = [0; 8];
+    let mut answer_mask = [true; 8];
+
+    for i in 0..std::u64::MAX {
+        hasher.input(key);
+        hasher.input(i.to_string().as_bytes());
+
+        let mut output = [0; 16]; //represents MD5 string
+        hasher.result(&mut output);
+
+        //check the first two and a half bytes of the output
+        let first_five = output[0] as i32 + output[1] as i32 + (output[2] >> 4) as i32;
+        if first_five == 0 {
+            let output_str: String = output.iter().map(|&c| format!("{:x}{:x}", c >> 4, c)).collect();
+            println!("hashed {} to get {}", i, output_str);
+            //answer.push(output[2]);
+            let idx = output[2] as usize;
+            let val = output[3] >> 4;
+            if idx < 8 && answer_mask[idx] {
+                answer[idx] = val;
+                answer_mask[idx] = false; //we filled this slot
+                println!("Values are {} and {}", idx, val);
+                match answer_mask.iter().fold(false, |f, &i| f || i) {
+                    true => {}, //keep going
+                    false => break, //we're all done here
+                }
+            }
+        }
+        hasher.reset();
+    }
+    let answer_str: String = answer.iter().map(|&c| format!("{:x}", c)).collect();
+    println!("Part 1: Answer is {}", answer_str);
+}
+
+fn main() {
+    //part_1();
+    part_2();
+}