1 files changed, 23 insertions, 0 deletions
diff --git a/scratch/facebook/merging-ranges.py b/scratch/facebook/merging-ranges.py
new file mode 100644
index 000000000000..6da44572ee7e
--- /dev/null
+++ b/scratch/facebook/merging-ranges.py
@@ -0,0 +1,23 @@
+
+def merge(xs):
+    xs.sort()
+    result = xs[0:1]
+    for a, b in xs[1:]:
+        y, z = result[-1]
+        if a <= z:
+            result[-1] = (y, max(b, z))
+        else:
+            result.append((a, b))
+    return result
+
+inputs = [([(0,1),(3,5),(4,8),(10,12),(9,10)], [(0,1),(3,8),(9,12)]),
+          ([(1,2),(2,3)], [(1,3)]),
+          ([(1,5),(2,3)], [(1,5)]),
+          ([(1,10),(2,6),(3,5),(7,9)], [(1,10)]),
+          ]
+for x, expected in inputs:
+    result = merge(x)
+    print(x)
+    print(result)
+    assert result == expected
+    print("Success!")