Topic: Math

alleasymediumhard

alltodoattemptedfailedsolved

503 problems

#	Title	Status	Difficulty	Topics	Accept
2	Add Two Numbers	—	Medium	Linked ListMathRecursion	46%
7	Reverse Integer	—	Medium	Math	30%
9	Palindrome Number	—	Easy	Math	59%
12	Integer to Roman	—	Medium	Hash TableMathString	68%
13	Roman to Integer	—	Easy	Hash TableMathString	65%
29	Divide Two Integers	—	Medium	MathBit Manipulation	18%
43	Multiply Strings	—	Medium	MathStringSimulation	42%
48	Rotate Image	—	Medium	ArrayMathMatrix	78%
50	Pow(x, n)	—	Medium	MathRecursion	37%
60	Permutation Sequence	—	Hard	MathRecursion	50%
62	Unique Paths	—	Medium	MathDynamic ProgrammingCombinatorics	66%
66	Plus One	—	Easy	ArrayMath	47%
67	Add Binary	—	Easy	MathStringBit Manipulation	56%
69	Sqrt(x)	—	Easy	MathBinary Search	40%
70	Climbing Stairs	—	Easy	MathDynamic ProgrammingMemoization	53%
89	Gray Code	—	Medium	MathBacktrackingBit Manipulation	62%
96	Unique Binary Search Trees	—	Medium	MathDynamic ProgrammingTree	62%
149	Max Points on a Line	—	Hard	ArrayHash TableMath	29%
150	Evaluate Reverse Polish Notation	—	Medium	ArrayMathStack	55%
166	Fraction to Recurring Decimal	—	Medium	Hash TableMathString	26%
168	Excel Sheet Column Title	—	Easy	MathString	43%
171	Excel Sheet Column Number	—	Easy	MathString	66%
172	Factorial Trailing Zeroesread	—	Medium	Math	45%
189	Rotate Array	—	Medium	ArrayMathTwo Pointers	43%
202	Happy Number	—	Easy	Hash TableMathTwo Pointers	58%
204	Count Primes	—	Medium	ArrayMathEnumeration	35%
223	Rectangle Area	—	Medium	MathGeometry	47%
224	Basic Calculator	—	Hard	MathStringStack	45%
227	Basic Calculator II	—	Medium	MathStringStack	46%
231	Power of Two	—	Easy	MathBit ManipulationRecursion	48%
233	Number of Digit One	—	Hard	MathDynamic ProgrammingRecursion	36%
241	Different Ways to Add Parenthesesread	—	Medium	MathStringDynamic Programming	72%
258	Add Digits	—	Easy	MathSimulationNumber Theory	68%
263	Ugly Number	—	Easy	Math	42%
264	Ugly Number II	—	Medium	Hash TableMathDynamic Programming	49%
268	Missing Number	—	Easy	ArrayHash TableMath	70%
273	Integer to English Words	—	Hard	MathStringRecursion	34%
279	Perfect Squares	—	Medium	MathDynamic ProgrammingBreadth-First Search	56%
282	Expression Add Operators	—	Hard	MathStringBacktracking	41%
292	Nim Game	—	Easy	MathBrainteaserGame Theory	58%
313	Super Ugly Number	—	Medium	ArrayMathDynamic Programming	45%
319	Bulb Switcher	—	Medium	MathBrainteaser	54%
326	Power of Three	—	Easy	MathRecursion	48%
335	Self Crossing	—	Hard	ArrayMathGeometry	32%
342	Power of Four	—	Easy	MathBit ManipulationRecursion	49%
343	Integer Break	—	Medium	MathDynamic Programming	61%
365	Water and Jug Problem	—	Medium	MathDepth-First SearchBreadth-First Search	43%
367	Valid Perfect Square	—	Easy	MathBinary Search	44%
368	Largest Divisible Subset	—	Medium	ArrayMathDynamic Programming	49%
371	Sum of Two Integers	—	Medium	MathBit Manipulation	54%

Page 1 of 11