diff --git a/homework_1/Makefile b/homework_1/Makefile
index 7bfadec..ac341b5 100644
--- a/homework_1/Makefile
+++ b/homework_1/Makefile
@@ -25,7 +25,8 @@ TARGET          := knnsearch
 # Source directories list(space seperated). Makefile-relative path, UNDER current directory.
 SRC_DIR_LIST    := src
 # Include directories list(space seperated). Makefile-relative path.
-INC_DIR_LIST    := src inc
+INC_DIR_LIST    := inc \
+                   src
 # Exclude files list(space seperated). Filenames only.
 # EXC_FILE_LIST := bad.cpp old.cpp
 
@@ -48,7 +49,7 @@ PRE_DEFS		:=
 
 # ============== Linker settings ==============
 # Linker flags (example: -pthread -lm)
-LDFLAGS         := -pthread
+LDFLAGS         := -pthread -lopenblas
 # Map output file
 MAP_FILE        := output.map
 MAP_FLAG        := -Xlinker -Map=$(BUILD_DIR)/$(MAP_FILE)
@@ -57,7 +58,7 @@ MAP_FLAG        := -Xlinker -Map=$(BUILD_DIR)/$(MAP_FILE)
 # We need:
 #  - Bind the entire project directory(the dir that icludes all the code) as volume.
 #  - In docker instance, change to working directory(where the makefile is).
-DOCKER_VOL_DIR  := $${PWD}
+DOCKER_VOL_DIR  := ${PWD}
 DOCKER_WRK_DIR  :=
 DOCKER_RUN      := docker run --rm
 DOCKER_FLAGS    := -v $(DOCKER_VOL_DIR):/usr/src/$(PROJECT) -w /usr/src/$(PROJECT)/$(DOCKER_WRK_DIR)
@@ -137,8 +138,8 @@ include $(wildcard $(DEP))
 $(BUILD_DIR)/$(TARGET): $(OBJ)
 	@mkdir -p $(@D)
 	@echo Linking to target: $(TARGET)
-	@echo $(DOCKER) $(CXX) $(LDFLAGS) $(MAP_FLAG) -o $(@D)/$(TARGET) '$$(OBJ)'
-	@$(DOCKER) $(CXX) $(LDFLAGS) $(MAP_FLAG) -o $(@D)/$(TARGET) $(OBJ)
+	@echo $(DOCKER) $(CXX) '$$(OBJ)' $(LDFLAGS) $(MAP_FLAG) -o $(@D)/$(TARGET)
+	@$(DOCKER) $(CXX) $(OBJ) $(LDFLAGS) $(MAP_FLAG) -o $(@D)/$(TARGET)
 	@echo
 	@echo Print size information
 	@$(CSIZE) $(@D)/$(TARGET)
@@ -221,7 +222,6 @@ v1: $(BUILD_DIR)/$(TARGET)
 	cp $(BUILD_DIR)/$(TARGET) out/$(TARGET)
 
 
-
 #
 # ========= Inside CSAL Image build rules ===========
 #
@@ -258,4 +258,14 @@ csal_v1: TARGET := knnsearch_v1
 csal_v1: $(BUILD_DIR)/$(TARGET)
 
 
-
+#
+# ======== Run from container =========
+#
+# examples:
+#
+# make IMAGE=hpcimage EXEC=knnsearch_v1 run
+# make IMAGE=hpcimage EXEC=knnsearch_cilkv1 run
+#
+run: DOCKER := $(DOCKER_CMD)
+run:
+	$(DOCKER) ./out/$(EXEC)
diff --git a/homework_1/src/main.cpp b/homework_1/src/main.cpp
index 4af4fc0..5b2e1d5 100644
--- a/homework_1/src/main.cpp
+++ b/homework_1/src/main.cpp
@@ -1,6 +1,15 @@
 #include <iostream>
+#include <cblas.h>
 
 int main(){
-   std::cout << "Hello from knnsearch\n";
+
+   double A[6] = {1.0,2.0,1.0,-3.0,4.0,-1.0};
+   double B[6] = {1.0,2.0,1.0,-3.0,4.0,-1.0};
+   double C[9] = {.5,.5,.5,.5,.5,.5,.5,.5,.5};
+   cblas_dgemm(CblasColMajor, CblasNoTrans, CblasTrans,3,3,2,1,A, 3, B, 3,2,C,3);
+
+   for (int i=0 ; i<9 ; ++i)
+      std::cout << C[i] << ' ';
+   std::cout << '\n';
 	return 0;
 }