Prefix hash (#48)

* first try for script

* fix some script warnings

* fix format

Author: lrvideckis

tests/scripts/ptc.sh

@@ -29,8 +29,13 @@ sed --in-place '/^\/\/NOLINTNEXTLINE(readability-identifier-naming)$/d' ../libra
 #adds hash code comments
 chmod +x ../library/contest/hash.sh
 for header in ../library/**/*.hpp; do
-	hash=$(sed '/^#include/d' "$header" | cpp -dD -P -fpreprocessed | ./../library/contest/hash.sh)
-	sed --in-place "1i //hash: $hash" "$header"
+	echo "$header"
+	cp "$header" input
+	lines="$(wc -l <input)"
+	for i in $(seq 1 "$lines"); do
+		hash=$(head -n "$i" input | sed '/^#include/d' | cpp -dD -P -fpreprocessed | ./../library/contest/hash.sh)
+		sed -i "${i}s/^/\/\*${hash}\*\/ /" "$header"
+	done
 done
 
 git submodule init