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					451.Sort Characters By FrequencyMedium5965221Add to ListShareGiven a strings, so…				
				
			 
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					1207.Unique Number of OccurrencesEasy292062Add to ListShareGiven an array of int…				
				
			 
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					380.Insert Delete GetRandom O(1)Medium6981353Add to ListShareImplement theRandom…				
				
			 
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					79.Word SearchMedium12096487Add to ListShareGiven anm x ngrid of charactersboard…				
				
			 
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					36.Valid SudokuMedium7416836Add to ListShareDetermine if a9 x 9Sudoku boardis va…				
				
			 
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					224.Basic CalculatorHard4893367Add to ListShareGiven a stringsrepresenting a val…				
				
			 
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					263.Ugly NumberEasy23601381Add to ListShareAnugly numberis a positive integer wh…				
				
			 
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					374.Guess Number Higher or LowerEasy2401288Add to ListShareWe are playing the Gu…				
				
			 
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					151.Reverse Words in a StringMedium49634399Add to ListShareGiven an input string…				
				
			 
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					295.Find Median from Data StreamHard9320180Add to ListShareThemedianis the middl…				
				
			 
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					212.Word Search IIHard7661347Add to ListShareGiven anm x nboardof characters and…				
				
			 
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					1293.Shortest Path in a Grid with Obstacles EliminationHard369063Add to ListShar…				
				
			 
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					49.Group AnagramsMedium12974387Add to ListShareGiven an array of stringsstrs, gr…				
				
			 
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					12.Integer to RomanMedium47464804Add to ListShareRoman numerals are represented …				
				
			 
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					692.Top K Frequent WordsMedium6373296Add to ListShareGiven an array of stringswo…