Create brightest-position-on-street.py

Author: kamyu104

Python/brightest-position-on-street.py

@@ -0,0 +1,23 @@
+# Time:  O(nlogn)
+# Space: O(n)
+
+import collections
+
+
+class Solution(object):
+    def brightestPosition(self, lights):
+        """
+        :type lights: List[List[int]]
+        :rtype: int
+        """
+        count = collections.Counter()
+        for i, r in lights:
+            count[i-r] += 1
+            count[i+r+1] -= 1
+        result = None
+        max_cnt = cnt = 0
+        for i, c in sorted(count.iteritems()):
+            cnt += c
+            if cnt > max_cnt:
+                max_cnt, result = cnt, i
+        return result