diff --git a/build.py b/build.py
index ca073ba..a17ce86 100644
--- a/build.py
+++ b/build.py
@@ -1,4 +1,26 @@
 def solution(array):
     """
     Enter code here
-    """
\ No newline at end of file
+    """
+    for i in range (0, len(array)):
+        for j in range (0, len(array[i])):
+            if (i == 0 and j == 0) or (i > 0 and j == 0) or (i == 0 and j > 0) or (i == len(array)-1) or (j == len(array)-1):
+                array[i][j] = array[i][j]
+            else:
+                array[i][j] = 0
+
+    return array
+
+'''
+import numpy as np
+
+a = np.array([
+    [1,1,1,1,1],
+    [1,1,1,1,1],
+    [1,1,1,1,1],
+    [1,1,1,1,1],
+    [1,1,1,1,1]
+])
+
+print solution(a)
+'''
diff --git a/build.pyc b/build.pyc
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index 0000000..e630af5
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..1105bc7
Binary files /dev/null and b/tests/__init__.pyc differ
diff --git a/tests/test_solution.pyc b/tests/test_solution.pyc
new file mode 100644
index 0000000..52b1c0e
Binary files /dev/null and b/tests/test_solution.pyc differ