Modify dir structure for cleaner repo

all.sh

 #!/bin/bash
 
-for f in *; do
-	if [ -d ${f} ]; then
+cd problems
+for f in */; do
+	dir=${f%*/}
+	if [ -d ${dir} ]; then
 		echo ""
-		echo "Running Problem: $f"
-		cd $f
+		echo "Running Problem: $dir"
+		cd $dir
 		./run.sh
 		cd ..
 	fi