Nov 17

Author: siddydutta

2024-11-November-LeetCoding-Challenge/README.md

@@ -19,7 +19,7 @@
 | November 14 | [2064. Minimized Maximum of Products Distributed to Any Store](https://leetcode.com/problems/minimized-maximum-of-products-distributed-to-any-store/) | Medium | Solved |
 | November 15 | [1574. Shortest Subarray to be Removed to Make Array Sorted](https://leetcode.com/problems/shortest-subarray-to-be-removed-to-make-array-sorted/) | Medium | Unsolved |
 | November 16 | [3254. Find the Power of K-Size Subarrays I](https://leetcode.com/problems/find-the-power-of-k-size-subarrays-i/) | Medium | Solved |
-| November 17 | []() |  |  |
+| November 17 | [862. Shortest Subarray with Sum at Least K](https://leetcode.com/problems/shortest-subarray-with-sum-at-least-k/) | Hard | Solved |
 | November 18 | []() |  |  |
 | November 19 | []() |  |  |
 | November 20 | []() |  |  |
@@ -39,4 +39,4 @@
 | ---    | --- | --- | --- |
 | Easy   | 3 | 3 | 0 |
 | Medium | 13 | 6 | 7 |
-| Hard   | 0 | 0 | 0 |
+| Hard   | 1 | 1 | 0 |

2024-11-November-LeetCoding-Challenge/Shortest Subarray with Sum at Least K.py

@@ -0,0 +1,35 @@
+from collections import deque
+from itertools import accumulate
+from typing import List
+
+
+class Solution:
+    def shortestSubarray(self, nums: List[int], k: int) -> int:
+        ps = [0] + list(accumulate(nums))
+        queue = deque()
+        min_length = float('inf')
+        for j in range(len(ps)):
+            while queue and ps[j] - ps[queue[0]] >= k:
+                min_length = min(min_length, j - queue.popleft())
+            while queue and ps[j] <= ps[queue[-1]]:
+                queue.pop()
+            queue.append(j)
+        return min_length if min_length != float('inf') else -1
+
+
+def main():
+    nums = [1]
+    k = 1
+    assert Solution().shortestSubarray(nums, k) == 1
+
+    nums = [1, 2]
+    k = 4
+    assert Solution().shortestSubarray(nums, k) == -1
+
+    nums = [2, -1, 2]
+    k = 3
+    assert Solution().shortestSubarray(nums, k) == 3
+
+
+if __name__ == '__main__':
+    main()