1 files changed, 5 insertions, 1 deletions
diff --git a/makefile b/makefile
index a13a109..ef0b2f0 100644
--- a/makefile
+++ b/makefile
@@ -1,11 +1,15 @@
 
 CFLAGS=-Wall
 
-all: bin/1a bin/1b \
+all: bin \
+	bin/1a bin/1b \
 	bin/2a bin/2b \
 	bin/3a bin/3b \
 	bin/4a bin/4b \
 	bin/5 \
 
+bin:
+	mkdir -p $@
+
 bin/%: %.c
 	$(CC) $(CFLAGS) -o $@ $<