diff --git a/pair_sum.py b/pair_sum.py
index e69de29..d3f0fa6 100644
--- a/pair_sum.py
+++ b/pair_sum.py
@@ -0,0 +1,9 @@
+def pairSum(li,n):
+    a=[]
+    for i in range(len(li)):
+          for j in range(i+1, len(li)):
+              if((li[i]+li[j]) == n):
+                a.append((li[i], li[j]))
+    return a
+#a=pairSum([2, 5, 4, 3, 8, 7, 6, 1, 10, -1],9)
+#print a
diff --git a/pair_sum.pyc b/pair_sum.pyc
new file mode 100644
index 0000000..92c776a
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..a86ad32
Binary files /dev/null and b/tests/__init__.pyc differ
diff --git a/tests/test_pairSum.pyc b/tests/test_pairSum.pyc
new file mode 100644
index 0000000..8a8ed88
Binary files /dev/null and b/tests/test_pairSum.pyc differ