Add bash variants

[advent-of-code-2020.git] / day2 / get_valid_count.sh

diff --git a/day2/get_valid_count.sh b/day2/get_valid_count.sh
new file mode 100644 (file)
index 0000000..d6ca89e
--- /dev/null
+++ b/day2/get_valid_count.sh
@@ -0,0 +1,44 @@
+#!/bin/bash
+
+check_file() {
+    cat input.txt | while read line; do
+        password=${line#*: }
+        params=${line%: *}
+        min=${params%-*}
+        params=${params#*-}
+        max=${params% *}
+        char=${params#* }
+        count=0
+        for ((i=0; i<${#password}; i++)); do
+            if [ "${password:$i:1}" = "$char" ]; then
+                count=$((count+1))
+            fi
+        done
+        if [ $count -ge $min ] && [ $count -le $max ]; then
+            echo "Got valid line!"
+        fi
+    done
+}
+
+echo "Got $(check_file | wc -l) valid lines"
+
+exit 0
+#!/usr/bin/python3
+
+import regex
+
+total_lines=0
+valid_lines=0
+for line in open("input.txt", "r"):
+    total_lines += 1
+    (min_count, max_count, letter, password) = regex.match('([0-9]+)-([0-9]+) ([a-z]): ([a-z]*)', line).group(1,2,3,4)
+    min_count=int(min_count)
+    max_count=int(max_count)
+    count = 0
+    for x in password:
+        if x == letter:
+            count += 1
+    if count >= min_count and count <= max_count:
+        valid_lines += 1
+
+print(valid_lines, "valid lines of", total_lines)