diff --git a/2021/Makefile b/2021/Makefile
index a8c06ab..bc812f3 100644
--- a/2021/Makefile
+++ b/2021/Makefile
@@ -24,7 +24,7 @@ CFLAGS += -Wall
 CFLAGS += -Wextra
 CFLAGS += -march=native
 
-CFLAGS += -DDEBUG		# activate general debug (debug.c)
+CFLAGS += -DDEBUG_DEBUG		# activate general debug (debug.c)
 CFLAGS += -DDEBUG_POOL		# memory pools management
 
 INCDIR    := ./include
diff --git a/2021/day11/Makefile b/2021/day11/Makefile
index e585a35..bd92198 100644
--- a/2021/day11/Makefile
+++ b/2021/day11/Makefile
@@ -24,7 +24,7 @@ LDLIB   := -l$(LIB)
 export LD_LIBRARY_PATH = $(LIBDIR)
 
 CFLAGS += -std=gnu99
-CFLAGS += -O2
+#CFLAGS += -O2
 CFLAGS += -g
 CFLAGS += -Wall
 CFLAGS += -Wextra
@@ -32,6 +32,9 @@ CFLAGS += -march=native
 CFLAGS += -Wmissing-declarations
 CFLAGS += -Wno-unused-result
 
+CFLAGS += -DDEBUG_DEBUG 	# activate general debug (debug.c)
+CFLAGS += -DDEBUG_POOL		# memory pools management
+
 TIME   := \time -f "\ttime: %E real, %U user, %S sys\n\tcontext-switch:\t%c+%w, page-faults: %F+%R\n"
 export PATH := .:$(PATH)
 
@@ -52,4 +55,4 @@ clean:
 
 .c:
 	@echo compiling $<
-	@$(CC) $(CFLAGS) $(LDFLAGS) -I $(INCDIR) $< $(LDLIB) -o $@
+	$(CC) $(CFLAGS) $(LDFLAGS) -I $(INCDIR) $< $(LDLIB) -o $@
diff --git a/2021/day11/README.txt b/2021/day11/README.txt
index 1beea5c..4560914 100644
--- a/2021/day11/README.txt
+++ b/2021/day11/README.txt
@@ -297,3 +297,7 @@ After step 100:
 After 100 steps, there have been a total of 1656 flashes.
 
 Given the starting energy levels of the dumbo octopuses in your cavern, simulate 100 steps. How many total flashes are there after 100 steps?
+
+Your puzzle answer was 1739.
+
+The first half of this puzzle is complete! It provides one gold star: *