chore: rebase rollback

[azl397985856]

Reverts #591

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 67.8%, saving 26.69 MB.

Filename	Before	After	Improvement	Visual comparison
assets/daily-board.png	328.53 KB	205.81 KB	-37.4%	View diff
assets/daily-summary.png	88.64 KB	47.15 KB	-46.8%	View diff
assets/daily.png	181.13 KB	114.71 KB	-36.7%	View diff
assets/daily/2019-07-23.jpeg	47.02 KB	35.72 KB	-24.0%	View diff
assets/daily/2019-07-26.jpeg	657.28 KB	128.40 KB	-80.5%	View diff
assets/daily/2019-07-30.jpg	4.08 MB	778.34 KB	-81.4%	View diff
assets/daily/weight-ball.jpg	60.88 KB	38.42 KB	-36.9%	View diff
assets/donate-weixin.jpg	133.50 KB	95.53 KB	-28.4%	View diff
assets/donate-zfb.jpg	102.29 KB	89.66 KB	-12.3%	View diff
assets/gongzhonghao.jpeg	40.15 KB	25.27 KB	-37.1%	View diff
assets/problems/1031.maximum-sum-of-two-non-overlapping-subarrays.png	136.14 KB	92.49 KB	-32.1%	View diff
assets/problems/105.index_explain.jpg	82.74 KB	48.48 KB	-41.4%	View diff
assets/problems/11.container-with-most-water-question.jpg	17.93 KB	14.19 KB	-20.8%	View diff
assets/problems/11.container-with-most-water.png	31.90 KB	17.90 KB	-43.9%	View diff
assets/problems/1168.optimize-water-distribution-in-a-village-1.png	680.68 KB	593.92 KB	-12.7%	View diff
assets/problems/1168.optimize-water-distribution-in-a-village-example1.png	28.17 KB	19.69 KB	-30.1%	View diff
assets/problems/121.best-time-to-buy-and-sell-stock.jpg	55.58 KB	31.13 KB	-44.0%	View diff
assets/problems/121.best-time-to-buy-and-sell-stock.png	33.81 KB	16.36 KB	-51.6%	View diff
assets/problems/122.best-time-to-buy-and-sell-stock-ii.png	34.03 KB	16.56 KB	-51.3%	View diff
assets/problems/124.binary-tree-maximum-path-sum-1.jpg	54.77 KB	28.70 KB	-47.6%	View diff
assets/problems/124.binary-tree-maximum-path-sum.jpg	37.75 KB	18.18 KB	-51.8%	View diff
assets/problems/125.valid-palindrome-1.png	16.17 KB	7.73 KB	-52.2%	View diff
assets/problems/125.valid-palindrome-2.png	20.27 KB	11.54 KB	-43.1%	View diff
assets/problems/129.sum-root-to-leaf-numbers-1.jpg	49.44 KB	29.47 KB	-40.4%	View diff
assets/problems/129.sum-root-to-leaf-numbers-2.jpg	68.66 KB	38.96 KB	-43.3%	View diff
assets/problems/130.surrounded-regions-1.jpg	33.30 KB	18.93 KB	-43.2%	View diff
assets/problems/130.surrounded-regions-2.jpg	60.75 KB	35.09 KB	-42.2%	View diff
assets/problems/139.word-break-1.png	46.69 KB	36.80 KB	-21.2%	View diff
assets/problems/139.word-break-2.png	16.65 KB	7.65 KB	-54.0%	View diff
assets/problems/139.word-break-3.png	16.43 KB	7.81 KB	-52.5%	View diff
assets/problems/139.word-break-4.png	29.68 KB	16.88 KB	-43.1%	View diff
assets/problems/139.word-break-5.png	60.36 KB	34.90 KB	-42.2%	View diff
assets/problems/139.word-break-6.png	67.99 KB	52.43 KB	-22.9%	View diff
assets/problems/15.3-sum.png	37.79 KB	19.49 KB	-48.4%	View diff
assets/problems/152.maximum-product-subarray.png	30.25 KB	16.83 KB	-44.4%	View diff
assets/problems/155.min-stack-1.png	16.48 KB	7.88 KB	-52.2%	View diff
assets/problems/155.min-stack-2.png	57.94 KB	33.31 KB	-42.5%	View diff
assets/problems/155.min-stack-3.png	35.20 KB	19.96 KB	-43.3%	View diff
assets/problems/169.majority-element.png	59.98 KB	35.07 KB	-41.5%	View diff
assets/problems/172.factorial-trailing-zeroes-1.png	35.31 KB	18.43 KB	-47.8%	View diff
assets/problems/172.factorial-trailing-zeroes-2.png	22.03 KB	9.75 KB	-55.8%	View diff
assets/problems/172.factorial-trailing-zeroes-3.png	38.91 KB	21.33 KB	-45.2%	View diff
assets/problems/191.number-of-1-bits.png	17.02 KB	15.71 KB	-7.7%	View diff
assets/problems/198.house-robber.png	58.44 KB	30.86 KB	-47.2%	View diff
assets/problems/200.number-of-islands.jpg	32.55 KB	18.17 KB	-44.2%	View diff
assets/problems/208.implement-trie-prefix-tree-1.en.png	44.92 KB	23.85 KB	-46.9%	View diff
assets/problems/208.implement-trie-prefix-tree-1.png	70.10 KB	40.23 KB	-42.6%	View diff
assets/problems/209.minimum-size-subarray-sum.png	55.41 KB	29.52 KB	-46.7%	View diff
assets/problems/215.kth-largest-element-in-an-array-heap.jpg	189.76 KB	88.95 KB	-53.1%	View diff
assets/problems/215.kth-largest-element-in-an-array-quick-select.jpg	172.97 KB	81.51 KB	-52.9%	View diff
assets/problems/221.maximal-square-1.jpg	28.70 KB	14.41 KB	-49.8%	View diff
assets/problems/221.maximal-square-2.jpg	26.84 KB	13.92 KB	-48.1%	View diff
assets/problems/221.maximal-square-3.jpg	23.48 KB	12.33 KB	-47.5%	View diff
assets/problems/229.majority-element-ii-2.jpeg	59.18 KB	45.43 KB	-23.2%	View diff
assets/problems/232.implement-queue-using-stacks-1.jpg	21.39 KB	8.71 KB	-59.3%	View diff
assets/problems/232.implement-queue-using-stacks-2.jpg	20.22 KB	8.05 KB	-60.2%	View diff
assets/problems/232.implement-queue-using-stacks-3.jpg	21.25 KB	8.72 KB	-59.0%	View diff
assets/problems/232.implement-queue-using-stacks-4.jpg	54.31 KB	29.41 KB	-45.8%	View diff
assets/problems/236.lowest-common-ancestor-of-a-binary-tree-1.png	7.35 KB	4.60 KB	-37.5%	View diff
assets/problems/236.lowest-common-ancestor-of-a-binary-tree-2.png	36.79 KB	23.33 KB	-36.6%	View diff
assets/problems/238.product-of-array-except-self.png	34.48 KB	18.55 KB	-46.2%	View diff
assets/problems/239.sliding-window-maximum.png	38.20 KB	19.12 KB	-49.9%	View diff
assets/problems/240.search-a-2-d-matrix-ii.png	47.48 KB	25.52 KB	-46.3%	View diff
assets/problems/263.ugly-number.png	29.38 KB	15.13 KB	-48.5%	View diff
assets/problems/29.divide-two-integers.png	60.56 KB	34.47 KB	-43.1%	View diff
assets/problems/295.find-median-from-data-stream-1.png	17.85 KB	8.71 KB	-51.2%	View diff
assets/problems/295.find-median-from-data-stream-2.png	18.58 KB	9.39 KB	-49.5%	View diff
assets/problems/295.find-median-from-data-stream-3.png	22.09 KB	11.18 KB	-49.4%	View diff
assets/problems/301.remove-invalid-parentheses.png	66.87 KB	41.74 KB	-37.6%	View diff
assets/problems/31.next-permutation-1.jpg	24.10 KB	12.98 KB	-46.1%	View diff
assets/problems/31.next-permutation-2.jpg	15.21 KB	7.45 KB	-51.0%	View diff
assets/problems/31.next-permutation-3.jpg	30.69 KB	16.78 KB	-45.3%	View diff
assets/problems/31.next-permutation-4.jpg	51.92 KB	29.93 KB	-42.4%	View diff
assets/problems/32.longest-valid-parentheses.png	116.05 KB	78.38 KB	-32.5%	View diff
assets/problems/334.increasing-triplet-subsequence.png	66.32 KB	43.49 KB	-34.4%	View diff
assets/problems/342.power-of-four-1.png	29.91 KB	13.37 KB	-55.3%	View diff
assets/problems/342.power-of-four-2.png	49.81 KB	31.30 KB	-37.2%	View diff
assets/problems/342.power-of-four.png	66.08 KB	45.98 KB	-30.4%	View diff
assets/problems/371.sum-of-two-integers-1.png	20.58 KB	9.99 KB	-51.4%	View diff
assets/problems/371.sum-of-two-integers-2.png	25.06 KB	12.42 KB	-50.4%	View diff
assets/problems/378.kth-smallest-element-in-a-sorted-matrix-1.jpg	17.03 KB	8.44 KB	-50.4%	View diff
assets/problems/378.kth-smallest-element-in-a-sorted-matrix-2.jpg	17.94 KB	9.07 KB	-49.4%	View diff
assets/problems/378.kth-smallest-element-in-a-sorted-matrix-3.jpg	18.32 KB	9.02 KB	-50.8%	View diff
assets/problems/378.kth-smallest-element-in-a-sorted-matrix-4.jpg	71.05 KB	39.34 KB	-44.6%	View diff
assets/problems/4.median-of-two-sorted-array-1.jpg	72.30 KB	36.81 KB	-49.1%	View diff
assets/problems/4.median-of-two-sorted-array-2.jpg	144.64 KB	74.07 KB	-48.8%	View diff
assets/problems/4.median-of-two-sorted-array-3.png	798.82 KB	428.11 KB	-46.4%	View diff
assets/problems/4.median-of-two-sorted-array-5.png	916.10 KB	846.26 KB	-7.6%	View diff
assets/problems/416.partition-equal-subset-sum-1.png	33.99 KB	28.48 KB	-16.2%	View diff
assets/problems/416.partition-equal-subset-sum-2.png	46.86 KB	25.61 KB	-45.4%	View diff
assets/problems/42.trapping-rain-water-1.png	7.66 KB	6.61 KB	-13.8%	View diff
assets/problems/437.path-sum-iii-1.jpg	63.86 KB	34.51 KB	-46.0%	View diff
assets/problems/437.path-sum-iii-2.jpg	54.08 KB	28.63 KB	-47.0%	View diff
assets/problems/454.4-sum-ii.png	47.33 KB	25.95 KB	-45.2%	View diff
assets/problems/460.lfu-cache-1.jpg	121.78 KB	52.04 KB	-57.3%	View diff
assets/problems/460.lfu-cache-2.jpg	133.27 KB	60.70 KB	-54.5%	View diff
assets/problems/460.lfu-cache-3.jpg	182.84 KB	85.10 KB	-53.5%	View diff
assets/problems/460.lfu-cache-4.jpg	175.37 KB	84.25 KB	-52.0%	View diff
assets/problems/460.lfu-cache-5.jpg	192.36 KB	90.78 KB	-52.8%	View diff
assets/problems/460.lfu-cache-6.jpg	224.47 KB	105.05 KB	-53.2%	View diff
assets/problems/460.lfu-cache-7.jpg	188.76 KB	116.27 KB	-38.4%	View diff
assets/problems/460.lfu-cache-8.jpg	267.12 KB	126.41 KB	-52.7%	View diff
assets/problems/474.ones-and-zeros-2d-dp.png	622.51 KB	535.91 KB	-13.9%	View diff
assets/problems/48.rotate-image-1.png	18.73 KB	9.24 KB	-50.7%	View diff
assets/problems/48.rotate-image-2.png	34.54 KB	19.93 KB	-42.3%	View diff
assets/problems/49.group-anagrams.png	21.21 KB	10.25 KB	-51.7%	View diff
assets/problems/494.target-sum-2.png	21.62 KB	9.26 KB	-57.2%	View diff
assets/problems/494.target-sum-3.png	46.98 KB	25.16 KB	-46.4%	View diff
assets/problems/494.target-sum.png	27.58 KB	13.31 KB	-51.7%	View diff
assets/problems/5.longest-palindromic-substring-1.png	15.06 KB	6.96 KB	-53.8%	View diff
assets/problems/5.longest-palindromic-substring-2.png	21.11 KB	13.43 KB	-36.4%	View diff
assets/problems/5.longest-palindromic-substring-3.png	21.12 KB	12.84 KB	-39.2%	View diff
assets/problems/516.longest-palindromic-subsequence-1.png	16.85 KB	7.93 KB	-52.9%	View diff
assets/problems/516.longest-palindromic-subsequence-2.png	22.74 KB	12.46 KB	-45.2%	View diff
assets/problems/516.longest-palindromic-subsequence-3.png	6.42 KB	1.96 KB	-69.6%	View diff
assets/problems/53.maximum-sum-subarray-divideconquer.png	784.24 KB	756.38 KB	-3.6%	View diff
assets/problems/54.spiral-matrix.jpg	17.80 KB	12.96 KB	-27.2%	View diff
assets/problems/547.friend-circle-uf.png	406.03 KB	297.05 KB	-26.8%	View diff
assets/problems/560.subarray-sum-equals-k.jpg	67.28 KB	35.57 KB	-47.1%	View diff
assets/problems/575.distribute-candies.png	46.67 KB	28.96 KB	-38.0%	View diff
assets/problems/62.unique-paths-2.png	8.74 KB	3.25 KB	-62.8%	View diff
assets/problems/62.unique-paths-3.png	51.01 KB	30.08 KB	-41.0%	View diff
assets/problems/73.set-matrix-zeroes-1.png	32.90 KB	17.96 KB	-45.4%	View diff
assets/problems/73.set-matrix-zeroes-2.png	27.59 KB	14.81 KB	-46.3%	View diff
assets/problems/88.merge-sorted-array-1.png	39.03 KB	20.27 KB	-48.1%	View diff
assets/problems/88.merge-sorted-array-2.png	15.02 KB	6.83 KB	-54.5%	View diff
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assets/problems/887.super-egg-drop-1.png	27.59 KB	14.63 KB	-47.0%	View diff
assets/problems/887.super-egg-drop-2.png	67.56 KB	40.52 KB	-40.0%	View diff
assets/problems/912.sort-an-array-1.png	48.45 KB	24.42 KB	-49.6%	View diff
assets/problems/912.sort-an-array-2.png	38.34 KB	29.81 KB	-22.3%	View diff
assets/problems/backtrack.png	84.89 KB	46.43 KB	-45.3%	View diff
assets/problems/coin-change-2-opt.png	42.47 KB	24.82 KB	-41.6%	View diff
assets/problems/coin-change-2-wrong.png	53.52 KB	34.42 KB	-35.7%	View diff
assets/problems/coin-change-2.png	53.49 KB	30.97 KB	-42.1%	View diff
assets/problems/koko-eating-bananas.png	108.26 KB	68.16 KB	-37.0%	View diff
assets/problems/search-in-rotated-sorted-array-1.jpg	53.15 KB	30.46 KB	-42.7%	View diff
assets/problems/search-in-rotated-sorted-array-2.jpg	76.63 KB	46.08 KB	-39.9%	View diff
assets/qq-group-chat.png	13.93 KB	8.85 KB	-36.5%	View diff
assets/thanks-gaving/chongqing-1.jpeg	7.34 MB	1.21 MB	-83.5%	View diff
assets/thanks-gaving/chongqing-2.jpeg	7.39 MB	1.14 MB	-84.6%	View diff
assets/thanks-gaving/chongqing-3.jpeg	7.14 MB	1.08 MB	-84.9%	View diff
assets/thanks-gaving/daily-problems.jpg	89.97 KB	50.60 KB	-43.8%	View diff
assets/thanks-gaving/first-commit.jpg	37.28 KB	18.38 KB	-50.7%	View diff
assets/thanks-gaving/hello-github.jpeg	20.44 KB	8.86 KB	-56.7%	View diff
assets/thanks-gaving/star-history.jpg	66.25 KB	36.90 KB	-44.3%	View diff
assets/thanks-gaving/司徒正美.jpeg	26.21 KB	11.82 KB	-54.9%	View diff
assets/thanks-gaving/多语言支持.jpg	86.41 KB	47.66 KB	-44.8%	View diff
assets/thanks-gaving/群聊-qq.jpg	42.33 KB	22.31 KB	-47.3%	View diff
assets/thanks-gaving/群聊-wechat.jpg	34.21 KB	16.87 KB	-50.7%	View diff
assets/thanks-gaving/英文主页.jpg	79.06 KB	43.98 KB	-44.4%	View diff
assets/thanks-gaving/英语进展.jpg	76.08 KB	42.39 KB	-44.3%	View diff
assets/thinkings/basic-data-structure-call-stack.png	64.00 KB	39.53 KB	-38.2%	View diff
assets/thinkings/basic-data-structure-queue-1.png	38.40 KB	27.51 KB	-28.4%	View diff
assets/thinkings/basic-data-structure-queue-2.png	55.13 KB	33.58 KB	-39.1%	View diff
assets/thinkings/basic-data-structure-stack.png	31.21 KB	24.53 KB	-21.4%	View diff
assets/thinkings/binary-tree-traversal-preorder.png	35.35 KB	18.84 KB	-46.7%	View diff
assets/thinkings/bloom-filter-url.png	99.94 KB	74.20 KB	-25.8%	View diff
assets/thinkings/bst.png	70.42 KB	59.26 KB	-15.8%	View diff
assets/thinkings/dynamic-programming-1.png	38.15 KB	20.21 KB	-47.0%	View diff
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assets/thinkings/dynamic-programming-3.png	34.28 KB	17.11 KB	-50.1%	View diff
assets/thinkings/graph-1.png	56.76 KB	47.81 KB	-15.8%	View diff
assets/thinkings/graph-2.png	89.02 KB	75.92 KB	-14.7%	View diff
assets/thinkings/huffman-example-fix.png	58.28 KB	44.95 KB	-22.9%	View diff
assets/thinkings/huffman-example.png	61.14 KB	35.01 KB	-42.7%	View diff
assets/thinkings/huffman-tree.webp	56.61 KB	48.91 KB	-13.6%	View diff
assets/thinkings/min-heap.png	20.62 KB	17.20 KB	-16.6%	View diff
assets/wechat-group-chat.jpeg	55.18 KB	36.94 KB	-33.1%	View diff

29 images did not require optimisation.

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