day 1 - frequency lists

mackuba · Dec 1, 2018 · 90a3639 · 90a3639
commit 90a3639
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diff --git a/day1/1frequency.cr b/day1/1frequency.cr
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+#!/usr/bin/env crystal run
+
+sum = 0
+
+STDIN.each_line do |line|
+  value = line.strip.to_i
+  sum += value
+end
+
+puts sum
diff --git a/day1/2repeating.cr b/day1/2repeating.cr
@@ -0,0 +1,23 @@
+#!/usr/bin/env crystal run
+
+list = [] of Int32
+
+STDIN.each_line do |line|
+  value = line.strip.to_i
+  list << value
+end
+
+found = {0 => true}
+sum = 0
+
+loop do
+  list.each do |value|
+    sum += value
+    if found[sum]?
+      puts sum
+      exit
+    else
+      found[sum] = true
+    end
+  end
+end