diff --git a/memory.c b/memory.c
index 2e2d12d..80239fc 100644
--- a/memory.c
+++ b/memory.c
@@ -16,8 +16,11 @@ unsigned int addr_bits;
 
 int number_of_blocks(unsigned int addr_bits,
                      unsigned int num_block_offset_bits) {
-    // TODO: Part 0
-    return 0;
+    if (addr_bits < num_block_offset_bits || num_block_offset_bits < 0 || addr_bits < 0)
+        return FAIL;
+
+    return addr_bits / exp2(num_block_offset_bits);
+
 }
 
 int read_memory_file(char* file_name) {