Create maximum-white-tiles-covered-by-a-carpet.py

Author: kamyu104

Python/maximum-white-tiles-covered-by-a-carpet.py

@@ -0,0 +1,22 @@
+# Time:  O(nlogn)
+# Space: O(1)
+
+# sliding window
+class Solution(object):
+    def maximumWhiteTiles(self, tiles, carpetLen):
+        """
+        :type tiles: List[List[int]]
+        :type carpetLen: int
+        :rtype: int
+        """
+        tiles.sort()
+        result = left = gap = 0
+        for right in xrange(len(tiles)):
+            if right-1 >= 0:
+                gap += (tiles[right][0]-1)-tiles[right-1][1]
+            result = max(result, min(tiles[right][1]-tiles[left][0]+1, carpetLen)-gap)
+            while tiles[right][1]-tiles[left][0]+1 > carpetLen:
+                left += 1
+                gap -= (tiles[left][0]-1)-tiles[left-1][1]
+                result = max(result, min(tiles[right][1]-tiles[left][0]+1, carpetLen)-gap)
+        return result