do 0373

0301-0400/0351-0400/0373FindKPairsWIthSmallestSums/demo.py

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+from heapq import heappop, heappush
+
+
+class Solution:
+    def kSmallestPairs(self, nums1: List[int], nums2: List[int], k: int) -> List[List[int]]:
+        M, N = len(nums1), len(nums2)
+        res = []
+        pq = [(nums1[i] + nums2[0], i, 0) for i in range(min(k, M))]
+        while pq and len(res) < k:
+            _, i, j = heappop(pq)
+            res.append([nums1[i], nums2[j]])
+            if j + 1 < N:
+                heappush(pq, (nums1[i] + nums2[j + 1], i, j + 1))
+        return res