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- unfollow(Integer,Integer) - function in g0301_0400.s0355_design_twitter.Twitter
- union(Integer,Integer) - function in g0701_0800.s0721_accounts_merge.Solution.UnionFind
- uniquePaths(Integer,Integer) - function in g0001_0100.s0062_unique_paths.Solution
- uniquePathsWithObstacles(Array) - function in g0001_0100.s0063_unique_paths_ii.Solution
- update(Integer,Integer) - function in g0301_0400.s0307_range_sum_query_mutable.NumArray
- updateBoard(Array,IntArray) - function in g0501_0600.s0529_minesweeper.Solution
- updateMatrix(Array) - function in g0501_0600.s0542_01_matrix.Solution