diff --git a/pair_sum.py b/pair_sum.py
index e69de29..1920bac 100644
--- a/pair_sum.py
+++ b/pair_sum.py
@@ -0,0 +1,14 @@
+def pairSum(ls,num):
+    final_list = []
+    first = 0
+    last = len(ls)-1
+    while(first < last):
+        if(ls[first]+ ls[last] == num):
+            final_list.append((ls[first], ls[last]))
+            first+=1
+            last-=1
+        elif (ls[first]+ls[last] < num):
+            first+=1
+        else:
+            last-=1
+    return final_list
diff --git a/pair_sum.pyc b/pair_sum.pyc
new file mode 100644
index 0000000..27a3851
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..916eaee
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diff --git a/tests/test_pairSum.pyc b/tests/test_pairSum.pyc
new file mode 100644
index 0000000..d9135dc
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