diff --git a/kdiffpairs.py b/kdiffpairs.py
new file mode 100644
index 00000000..46be5002
--- /dev/null
+++ b/kdiffpairs.py
@@ -0,0 +1,21 @@
+class Solution:
+    def findPairs(self, nums, k):
+        if k < 0:
+            return 0
+
+        seen = set()
+        pairs = set()
+
+        for num in nums:
+            if num + k in seen:
+                pairs.add((num, num+k))
+
+            if num - k in seen:
+                pairs.add((num-k, num))
+
+            seen.add(num)
+
+        return len(pairs)
+
+# TC - O(n)
+# SC - O(n)
\ No newline at end of file
diff --git a/pascaltriangle.py b/pascaltriangle.py
new file mode 100644
index 00000000..02767ba5
--- /dev/null
+++ b/pascaltriangle.py
@@ -0,0 +1,16 @@
+class Solution:
+    def generate(self, numRows):
+        triangle = []
+
+        for i in range(numRows):
+            row = [1] * (i + 1)
+
+            for j in range(1, i):
+                row[j] = triangle[i-1][j-1] + triangle[i-1][j]
+
+            triangle.append(row)
+
+        return triangle
+
+    # TC - O(n^2)
+    # SC - O(n^2) Auxiliary O(n)
\ No newline at end of file