docs: add 1219

src/1219.Path-with-Maximum-Gold.py

@@ -0,0 +1,31 @@
+class Solution:
+    def getMaximumGold(self, grid: List[List[int]]) -> int:
+        m, n = len(grid), len(grid[0])
+        maxScore = 0
+
+        def backtrack(row, col, curScore):
+            nonlocal maxScore
+            if row < 0 or row >= m or col < 0 or col >= n:
+                return
+
+            if grid[row][col] == 0:
+                return
+
+            oldScore = grid[row][col]
+            curScore += oldScore
+            maxScore = max(maxScore, curScore)
+            grid[row][col] = 0
+
+            backtrack(row+1, col, curScore)
+            backtrack(row-1, col, curScore)
+            backtrack(row, col+1, curScore)
+            backtrack(row, col-1, curScore)
+
+            # backtrack
+            grid[row][col] = oldScore
+
+        for row in range(m):
+            for col in range(n):
+                backtrack(row, col, 0)
+
+        return maxScore