From d2fc2be177cbf2c92432ba5d1829890dc72b027c Mon Sep 17 00:00:00 2001
From: Ray Slakinski <ray.slakinski@gmail.com>
Date: Mon, 7 Dec 2020 14:45:53 -0500
Subject: [PATCH] solution for day 6

---
 2020/day_6/Cargo.toml  |   10 +
 2020/day_6/input       | 2086 ++++++++++++++++++++++++++++++++++++++++
 2020/day_6/src/main.rs |   42 +
 2020/day_6/test        |   16 +
 4 files changed, 2154 insertions(+)
 create mode 100644 2020/day_6/Cargo.toml
 create mode 100644 2020/day_6/input
 create mode 100644 2020/day_6/src/main.rs
 create mode 100644 2020/day_6/test

diff --git a/2020/day_6/Cargo.toml b/2020/day_6/Cargo.toml
new file mode 100644
index 0000000..12cbdee
--- /dev/null
+++ b/2020/day_6/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "day_6"
+version = "0.1.0"
+authors = ["Ray Slakinski <ray.slakinski@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+counter = "0.5.2"
\ No newline at end of file
diff --git a/2020/day_6/input b/2020/day_6/input
new file mode 100644
index 0000000..67b0b11
--- /dev/null
+++ b/2020/day_6/input
@@ -0,0 +1,2086 @@
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+
diff --git a/2020/day_6/src/main.rs b/2020/day_6/src/main.rs
new file mode 100644
index 0000000..0df3f74
--- /dev/null
+++ b/2020/day_6/src/main.rs
@@ -0,0 +1,42 @@
+use counter::Counter;
+use std::{collections::HashMap, println};
+fn main() {
+    let contents = std::fs::read_to_string("input").unwrap();
+    let mut groups = Vec::new();
+    let mut group = Vec::new();
+    let mut total_count = 0;
+
+    for line in contents.lines() {
+        if line.len() > 0 {
+            group.push(line.to_string());
+        } else {
+            groups.push(group.to_vec());
+            group.clear();
+        }
+    }
+    for g in &groups {
+        let voters = g.len();
+        let mut all_votes: Vec<HashMap<char, usize>> = Vec::new();
+        for v in g {
+            let counts = v.chars().collect::<Counter<_>>();
+            all_votes.push(counts.into_map());
+        }
+        println!("{:?}", all_votes);
+        let mut vote_count = 0;
+        for c in b'a'..=b'z' {
+            for v in &all_votes {
+                let l = c as char;
+                // println!("{:?}", v[&l]);
+                if v.contains_key(&l) {
+                    vote_count += 1;
+                }
+            }
+            if vote_count == voters {
+                total_count += 1;
+            }
+            vote_count = 0
+        }
+        all_votes.clear()
+    }
+    println!("Total unique people voted {}", total_count);
+}
diff --git a/2020/day_6/test b/2020/day_6/test
new file mode 100644
index 0000000..d6720f0
--- /dev/null
+++ b/2020/day_6/test
@@ -0,0 +1,16 @@
+abc
+
+a
+b
+c
+
+ab
+ac
+
+a
+a
+a
+a
+
+b
+