[ImgBot] Optimize images

*Total -- 3,197.70kb -> 2,102.95kb (34.24%)

/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/images/bstdllreturndll.png -- 17.36kb -> 3.06kb (82.38%)
/solution/1600-1699/1631.Path With Minimum Effort/images/ex3.png -- 19.14kb -> 4.77kb (75.09%)
/solution/1500-1599/1559.Detect Cycles in 2D Grid/images/1.png -- 3.68kb -> 1.02kb (72.3%)
/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/images/narytreeexample.png -- 30.02kb -> 8.57kb (71.44%)
/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/images/bstdlloriginalbst.png -- 22.80kb -> 6.62kb (70.95%)
/solution/0100-0199/0157.Read N Characters Given Read4/images/157_example.png -- 111.88kb -> 36.65kb (67.24%)
/solution/0100-0199/0158.Read N Characters Given Read4 II - Call multiple times/images/157_example.png -- 111.88kb -> 36.65kb (67.24%)
/solution/1500-1599/1559.Detect Cycles in 2D Grid/images/22.png -- 3.97kb -> 1.31kb (67.07%)
/solution/0500-0599/0588.Design In-Memory File System/images/filesystem.png -- 155.68kb -> 51.42kb (66.97%)
/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/images/bstdllreturnbst.png -- 50.19kb -> 17.25kb (65.62%)
/solution/1500-1599/1559.Detect Cycles in 2D Grid/images/3.png -- 2.76kb -> 0.98kb (64.37%)
/solution/1700-1799/1739.Building Boxes/images/10-boxes.png -- 9.66kb -> 3.48kb (63.93%)
/solution/1000-1099/1056.Confusing Number/images/1268_1.png -- 6.53kb -> 2.38kb (63.59%)
/solution/1600-1699/1637.Widest Vertical Area Between Two Points Containing No Points/images/points3.png -- 8.96kb -> 3.29kb (63.29%)
/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/images/trees2.png -- 9.94kb -> 3.74kb (62.41%)
/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/images/screenshot-2021-01-11-at-60703-pm.png -- 117.89kb -> 45.48kb (61.42%)
/solution/1000-1099/1056.Confusing Number/images/1268_4.png -- 8.09kb -> 3.13kb (61.35%)
/solution/1000-1099/1056.Confusing Number/images/1268_2.png -- 9.51kb -> 3.79kb (60.13%)
/solution/1600-1699/1620.Coordinate With Maximum Network Quality/images/untitled-diagram.png -- 4.39kb -> 1.75kb (60.12%)
/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/images/tree.png -- 18.89kb -> 7.71kb (59.2%)
/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/images/screenshot-2021-01-11-at-60048-pm.png -- 92.04kb -> 37.61kb (59.13%)
/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/images/screenshot-2021-01-11-at-60150-pm.png -- 92.15kb -> 38.04kb (58.72%)
/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/images/untitled.png -- 6.78kb -> 2.96kb (56.41%)
/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/images/trios1.png -- 11.14kb -> 4.95kb (55.6%)
/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/images/untitled22.png -- 8.23kb -> 3.67kb (55.34%)
/solution/1700-1799/1727.Largest Submatrix With Rearrangements/images/screenshot-2020-12-30-at-40536-pm.png -- 160.52kb -> 71.97kb (55.16%)
/solution/1700-1799/1727.Largest Submatrix With Rearrangements/images/screenshot-2020-12-30-at-40852-pm.png -- 86.40kb -> 39.26kb (54.56%)
/solution/0400-0499/0469.Convex Polygon/images/polygon_not_convex.png -- 1.89kb -> 0.88kb (53.57%)
/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/images/trios2.png -- 12.85kb -> 5.97kb (53.53%)
/solution/0400-0499/0469.Convex Polygon/images/polygon_convex.png -- 1.01kb -> 0.48kb (52.71%)
/solution/1600-1699/1659.Maximize Grid Happiness/images/grid_happiness.png -- 5.75kb -> 2.78kb (51.65%)
/solution/1600-1699/1617.Count Subtrees With Max Distance Between Cities/images/p1.png -- 5.04kb -> 2.47kb (50.94%)
/solution/1500-1599/1584.Min Cost to Connect All Points/images/d.png -- 6.85kb -> 3.46kb (49.49%)
/solution/0400-0499/0431.Encode N-ary Tree to Binary Tree/images/narytreebinarytreeexample.png -- 74.52kb -> 40.12kb (46.17%)
/solution/1700-1799/1739.Building Boxes/images/4-boxes.png -- 4.86kb -> 2.62kb (46.13%)
/solution/1600-1699/1631.Path With Minimum Effort/images/ex1.png -- 10.04kb -> 5.44kb (45.83%)
/solution/1000-1099/1056.Confusing Number/images/1268_3.png -- 1.67kb -> 0.91kb (45.76%)
/solution/1500-1599/1564.Put Boxes Into the Warehouse I/images/21.png -- 10.49kb -> 5.77kb (44.94%)
/solution/1500-1599/1584.Min Cost to Connect All Points/images/c.png -- 10.08kb -> 5.64kb (44.09%)
/solution/1500-1599/1564.Put Boxes Into the Warehouse I/images/11.png -- 10.19kb -> 5.70kb (44.03%)
/solution/1600-1699/1643.Kth Smallest Instructions/images/ex3.png -- 15.32kb -> 8.62kb (43.7%)
/solution/1600-1699/1643.Kth Smallest Instructions/images/ex1.png -- 14.12kb -> 7.95kb (43.67%)
/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/images/ex3.png -- 6.39kb -> 3.60kb (43.67%)
/solution/1600-1699/1621.Number of Sets of K Non-Overlapping Line Segments/images/ex1.png -- 3.71kb -> 2.09kb (43.64%)
/solution/1600-1699/1610.Maximum Number of Visible Points/images/89a07e9b-00ab-4967-976a-c723b2aa8656.png -- 7.85kb -> 4.44kb (43.43%)
/solution/1600-1699/1631.Path With Minimum Effort/images/ex2.png -- 10.63kb -> 6.06kb (43.03%)
/solution/1600-1699/1643.Kth Smallest Instructions/images/ex2.png -- 14.84kb -> 8.58kb (42.18%)
/solution/1700-1799/1739.Building Boxes/images/3-boxes.png -- 3.91kb -> 2.31kb (40.93%)
/solution/1500-1599/1564.Put Boxes Into the Warehouse I/images/22.png -- 9.30kb -> 5.50kb (40.78%)
/solution/1500-1599/1564.Put Boxes Into the Warehouse I/images/12.png -- 9.06kb -> 5.43kb (40.03%)
/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/images/1261_example_1_v2.png -- 18.90kb -> 11.38kb (39.76%)
/solution/1600-1699/1615.Maximal Network Rank/images/ex1.png -- 9.53kb -> 5.76kb (39.57%)
/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/images/1261_example_2_v2.png -- 20.00kb -> 12.26kb (38.72%)
/solution/1500-1599/1559.Detect Cycles in 2D Grid/images/11.png -- 6.06kb -> 3.74kb (38.27%)
/solution/1600-1699/1615.Maximal Network Rank/images/ex2.png -- 10.00kb -> 6.24kb (37.58%)
/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/images/ex1.png -- 7.43kb -> 4.78kb (35.61%)
/solution/1500-1599/1559.Detect Cycles in 2D Grid/images/2.png -- 6.16kb -> 3.98kb (35.36%)
/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/images/ex2.png -- 8.32kb -> 5.39kb (35.17%)
/solution/1500-1599/1558.Minimum Numbers of Function Calls to Make Target Array/images/sample_2_1887.png -- 6.91kb -> 4.54kb (34.29%)
/solution/0300-0399/0356.Line Reflection/images/356_example_1.png -- 10.93kb -> 7.21kb (34.09%)
/solution/1600-1699/1669.Merge In Between Linked Lists/images/fig1.png -- 23.86kb -> 16.19kb (32.14%)
/solution/1600-1699/1669.Merge In Between Linked Lists/images/merge_linked_list_ex2.png -- 24.83kb -> 16.99kb (31.58%)
/solution/1600-1699/1669.Merge In Between Linked Lists/images/merge_linked_list_ex1.png -- 22.51kb -> 15.50kb (31.17%)
/solution/1600-1699/1606.Find Servers That Handled Most Number of Requests/images/load-1.png -- 15.26kb -> 10.59kb (30.61%)
/solution/1600-1699/1610.Maximum Number of Visible Points/images/5010bfd3-86e6-465f-ac64-e9df941d2e49.png -- 16.13kb -> 11.44kb (29.09%)
/solution/0500-0599/0573.Squirrel Simulation/images/squirrel_simulation.png -- 78.22kb -> 55.82kb (28.64%)
/solution/0300-0399/0356.Line Reflection/images/356_example_2.png -- 7.97kb -> 5.99kb (24.86%)
/solution/0400-0499/0490.The Maze/images/maze_1_example_1.png -- 51.03kb -> 38.53kb (24.5%)
/solution/0500-0599/0505.The Maze II/images/maze_1_example_1.png -- 51.03kb -> 38.53kb (24.5%)
/solution/0400-0499/0490.The Maze/images/maze_1_example_2.png -- 50.87kb -> 38.43kb (24.45%)
/solution/0500-0599/0505.The Maze II/images/maze_1_example_2.png -- 50.87kb -> 38.43kb (24.45%)
/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/images/q.png -- 13.41kb -> 11.39kb (15.07%)
/solution/1600-1699/1691.Maximum Height by Stacking Cuboids/images/image.jpg -- 55.00kb -> 47.20kb (14.2%)
/solution/0200-0299/0285.Inorder Successor in BST/images/285_example_1.png -- 2.21kb -> 1.92kb (13.22%)
/solution/0500-0599/0510.Inorder Successor in BST II/images/285_example_1.png -- 2.21kb -> 1.92kb (13.22%)
/solution/1700-1799/1706.Where Will the Ball Fall/images/ball.jpg -- 146.05kb -> 126.79kb (13.19%)
/solution/0300-0399/0351.Android Unlock Patterns/images/android-unlock.png -- 22.57kb -> 19.77kb (12.38%)
/solution/0400-0499/0499.The Maze III/maze_2_example_2.png -- 57.22kb -> 50.17kb (12.32%)
/solution/0400-0499/0490.The Maze/images/maze_2_example_2.png -- 57.22kb -> 50.17kb (12.32%)
/solution/0400-0499/0499.The Maze III/maze_2_example_1.png -- 57.93kb -> 51.00kb (11.97%)
/solution/0400-0499/0490.The Maze/images/maze_2_example_1.png -- 57.93kb -> 51.00kb (11.97%)
/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/images/h.png -- 9.50kb -> 8.65kb (8.94%)
/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/images/move1.jpg -- 77.77kb -> 70.99kb (8.72%)
/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/images/move2.jpg -- 41.46kb -> 38.13kb (8.02%)
/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/images/chip_e2.jpg -- 59.75kb -> 55.44kb (7.22%)
/solution/0200-0299/0277.Find the Celebrity/images/277_example_2.png -- 7.16kb -> 6.66kb (6.97%)
/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/images/chips_e1.jpg -- 47.00kb -> 43.80kb (6.81%)
/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/images/images/ants.jpg -- 48.82kb -> 45.59kb (6.61%)
/solution/0200-0299/0277.Find the Celebrity/images/277_example_1_bold.png -- 7.03kb -> 6.58kb (6.38%)
/solution/0200-0299/0285.Inorder Successor in BST/images/285_example_2.png -- 7.34kb -> 6.89kb (6.15%)
/solution/0500-0599/0510.Inorder Successor in BST II/images/285_example_2.png -- 7.34kb -> 6.89kb (6.15%)
/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/images/images/ants2.jpg -- 13.03kb -> 12.33kb (5.33%)
/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/images/images/ants3.jpg -- 13.27kb -> 12.58kb (5.23%)
/solution/1500-1599/1572.Matrix Diagonal Sum/images/sample_1911.png -- 12.88kb -> 12.25kb (4.89%)
/solution/0200-0299/0250.Count Univalue Subtrees/images/unival_e1.jpg -- 17.95kb -> 17.09kb (4.8%)
/solution/1600-1699/1609.Even Odd Tree/images/sample_1_333_1966.png -- 23.06kb -> 21.96kb (4.79%)
/solution/0500-0599/0510.Inorder Successor in BST II/images/285_example_34.png -- 17.03kb -> 16.22kb (4.75%)
/solution/1600-1699/1627.Graph Connectivity With Threshold/images/tmp.jpg -- 27.40kb -> 26.32kb (3.93%)
/solution/1200-1299/1236.Web Crawler/images/sample_3_1497.png -- 30.25kb -> 29.10kb (3.81%)
/solution/1200-1299/1236.Web Crawler/images/sample_2_1497.png -- 38.58kb -> 37.15kb (3.71%)
/solution/1700-1799/1721.Swapping Nodes in a Linked List/images/linked1.jpg -- 23.91kb -> 23.07kb (3.52%)
/solution/1600-1699/1609.Even Odd Tree/images/sample_2_1966.png -- 10.51kb -> 10.18kb (3.07%)
/solution/1500-1599/1560.Most Visited Sector in  a Circular Track/images/tmp.jpg -- 22.68kb -> 22.02kb (2.92%)
/solution/1600-1699/1627.Graph Connectivity With Threshold/images/ex1.jpg -- 9.78kb -> 9.50kb (2.87%)
/solution/1600-1699/1632.Rank Transform of a Matrix/images/rank3.jpg -- 29.45kb -> 28.67kb (2.65%)
/solution/1600-1699/1609.Even Odd Tree/images/sample_1_1966.png -- 16.98kb -> 16.55kb (2.52%)
/solution/1500-1599/1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits/images/q4_1.jpg -- 4.61kb -> 4.50kb (2.42%)
/solution/1600-1699/1632.Rank Transform of a Matrix/images/rank4.jpg -- 19.92kb -> 19.63kb (1.44%)
/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/images/sample_4_964.png -- 30.75kb -> 30.37kb (1.24%)
/solution/0700-0799/0723.Candy Crush/images/candy_crush_example_2.png -- 107.91kb -> 107.34kb (0.53%)
/solution/1600-1699/1627.Graph Connectivity With Threshold/images/ex3.jpg -- 15.22kb -> 15.17kb (0.3%)

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