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小墨
2023-12-09 19:57:46 +08:00
parent 9bc4722a45
commit 3770b44d1e
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leetcode/originData/increment-submatrices-by-one.json
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@@ -11,7 +11,7 @@
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"difficulty": "Medium",
"likes": 439,
"likes": 440,
"dislikes": 59,
"isLiked": null,
"similarQuestions": "[{\"title\": \"Range Sum Query 2D - Mutable\", \"titleSlug\": \"range-sum-query-2d-mutable\", \"difficulty\": \"Hard\", \"translatedTitle\": null}, {\"title\": \"Count Positions on Street With Required Brightness\", \"titleSlug\": \"count-positions-on-street-with-required-brightness\", \"difficulty\": \"Medium\", \"translatedTitle\": null}]",
@@ -155,7 +155,7 @@
"__typename": "CodeSnippetNode"
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"stats": "{\"totalAccepted\": \"19.2K\", \"totalSubmission\": \"39.7K\", \"totalAcceptedRaw\": 19186, \"totalSubmissionRaw\": 39701, \"acRate\": \"48.3%\"}",
"stats": "{\"totalAccepted\": \"19.2K\", \"totalSubmission\": \"39.7K\", \"totalAcceptedRaw\": 19204, \"totalSubmissionRaw\": 39722, \"acRate\": \"48.3%\"}",
"hints": [
"Imagine each row as a separate array. Instead of updating the whole submatrix together, we can use prefix sum to update each row separately.",
"For each query, iterate over the rows i in the range [row1, row2] and add 1 to prefix sum S[i][col1], and subtract 1 from S[i][col2 + 1].",