feat: query the problem set for title and url

create.sh

@@ -1,21 +1,30 @@
 #!/bin/bash
 
-num=$1
+id=$1
 
-echo "$num" | grep -q "^[1-9][0-9]\{,4\}$" || {
-    echo "Err: no valid number given" >&2
+echo "$id" | grep -q "^[1-9][0-9]\{,4\}$" || {
+    echo "Err: no valid problem ID provided." >&2
     exit 1
 }
 
-parent=$((num / 100))
-pdir="solutions/${parent}/q${num}"
+parent=$((id / 100))
+pdir="solutions/${parent}/q${id}"
+
 sol_file="${pdir}/solution.go"
 
 if [ -f "$sol_file" ]; then
     exit 0
 fi
 
-echo "Creating template for question No. $num" >&2
+title_slug=$(jq -r "select(.id == $id) | .titleSlug" ./problemset.jsonl)
+[ -n "$title_slug" ] || {
+    echo "Err: problem $id not found in the problem set." >&2
+    exit 1
+}
+
+echo -e "Creating template for problem \033[32m${id}: $title_slug\033[0m" >&2
 mkdir -pv "$pdir"
-echo "package q$num" > "$sol_file"
+echo "// Package q$id implements solution for https://leetcode.com/problems/$title_slug/" > "$sol_file"
+echo "package q$id" >> "$sol_file"
+
 echo "Created $sol_file"