Create: 0278-first-bad-version.py

Author: mehdi-opensee

Diff for: python/0278-first-bad-version.py

@@ -0,0 +1,10 @@
+class Solution:
+    def firstBadVersion(self, n: int) -> int:
+        l, r = 1, n
+        while l < r:
+            v = (l + r) // 2
+            if isBadVersion(v):
+                r = v
+            else:
+                l = v + 1
+        return l