Add 4

1 files changed, 39 insertions, 0 deletions

diff --git a/4 b/4
new file mode 100755
index 0000000..92a653b
--- /dev/null
+++ b/4
@@ -0,0 +1,39 @@
+#!/bin/sh -eu
+p1() (
+	sum=0
+	while IFS= read -r l
+	do
+		r1=$(printf "$l" | cut -d',' -f1)
+		r2=$(printf "$l" | cut -d',' -f2)
+		x1=$(printf "$r1" | cut -d'-' -f1)
+		y1=$(printf "$r1" | cut -d'-' -f2)
+		x2=$(printf "$r2" | cut -d'-' -f1)
+		y2=$(printf "$r2" | cut -d'-' -f2)
+		if ([ $x1 -le $x2 ] && [ $y1 -ge $y2 ]) || ([ $x2 -le $x1 ] && [ $y2 -ge $y1 ])
+		then
+			sum=$((sum + 1))
+		fi
+	done < input.txt
+	printf "%s\n" "$sum"
+)
+
+p2() (
+	sum=0
+	while IFS= read -r l
+	do
+		r1=$(printf "$l" | cut -d',' -f1)
+		r2=$(printf "$l" | cut -d',' -f2)
+		x1=$(printf "$r1" | cut -d'-' -f1)
+		y1=$(printf "$r1" | cut -d'-' -f2)
+		x2=$(printf "$r2" | cut -d'-' -f1)
+		y2=$(printf "$r2" | cut -d'-' -f2)
+		if ([ $y1 -ge $x2 ] && [ $x1 -le $y2 ]) || ([ $y2 -ge $x1 ] && [ $x2 -le $y1 ])
+		then
+			sum=$((sum + 1))
+		fi
+	done < input.txt
+	printf "%s\n" "$sum"
+)
+
+p1
+p2