Math in Python with Tests

Math holds 229 problems (56 Easy, 123 Medium, 50 Hard). Generate any of them into the current directory with lcpy gen -n <number>.

#	Problem	Difficulty	Solution
2	Add Two Numbers	Medium	solution.py
7	Reverse Integer	Medium	solution.py
9	Palindrome Number	Easy	solution.py
12	Integer to Roman	Medium	solution.py
13	Roman to Integer	Easy	solution.py
29	Divide Two Integers	Medium	solution.py
43	Multiply Strings	Medium	solution.py
48	Rotate Image	Medium	solution.py
50	Pow(x, n)	Medium	solution.py
60	Permutation Sequence	Hard	solution.py
62	Unique Paths	Medium	solution.py
66	Plus One	Easy	solution.py
67	Add Binary	Easy	solution.py
69	Sqrt(x)	Easy	solution.py
70	Climbing Stairs	Easy	solution.py
89	Gray Code	Medium	solution.py
96	Unique Binary Search Trees	Medium	solution.py
149	Max Points on a Line	Hard	solution.py
150	Evaluate Reverse Polish Notation	Medium	solution.py
166	Fraction to Recurring Decimal	Medium	solution.py
168	Excel Sheet Column Title	Easy	solution.py
171	Excel Sheet Column Number	Easy	solution.py
172	Factorial Trailing Zeroes	Medium	solution.py
189	Rotate Array	Medium	solution.py
202	Happy Number	Easy	solution.py
204	Count Primes	Medium	solution.py
223	Rectangle Area	Medium	solution.py
224	Basic Calculator	Hard	solution.py
227	Basic Calculator II	Medium	solution.py
231	Power of Two	Easy	solution.py
233	Number of Digit One	Hard	solution.py
241	Different Ways to Add Parentheses	Medium	solution.py
258	Add Digits	Easy	solution.py
263	Ugly Number	Easy	solution.py
264	Ugly Number II	Medium	solution.py
268	Missing Number	Easy	solution.py
273	Integer to English Words	Hard	solution.py
279	Perfect Squares	Medium	solution.py
282	Expression Add Operators	Hard	solution.py
292	Nim Game	Easy	solution.py
294	Flip Game II	Medium	solution.py
296	Best Meeting Point	Hard	solution.py
313	Super Ugly Number	Medium	solution.py
319	Bulb Switcher	Medium	solution.py
326	Power of Three	Easy	solution.py
335	Self Crossing	Hard	solution.py
342	Power of Four	Easy	solution.py
343	Integer Break	Medium	solution.py
356	Line Reflection	Medium	solution.py
357	Count Numbers with Unique Digits	Medium	solution.py
360	Sort Transformed Array	Medium	solution.py
365	Water and Jug Problem	Medium	solution.py
367	Valid Perfect Square	Easy	solution.py
368	Largest Divisible Subset	Medium	solution.py
369	Plus One Linked List	Medium	solution.py
371	Sum of Two Integers	Medium	solution.py
372	Super Pow	Medium	solution.py
375	Guess Number Higher or Lower II	Medium	solution.py
380	Insert Delete GetRandom O(1)	Medium	solution.py
381	Insert Delete GetRandom O(1) - Duplicates allowed	Hard	solution.py
382	Linked List Random Node	Medium	solution.py
384	Shuffle an Array	Medium	solution.py
390	Elimination Game	Medium	solution.py
391	Perfect Rectangle	Hard	solution.py
396	Rotate Function	Medium	solution.py
398	Random Pick Index	Medium	solution.py
400	Nth Digit	Medium	solution.py
405	Convert a Number to Hexadecimal	Easy	solution.py
412	Fizz Buzz	Easy	solution.py
415	Add Strings	Easy	solution.py
423	Reconstruct Original Digits from English	Medium	solution.py
441	Arranging Coins	Easy	solution.py
445	Add Two Numbers II	Medium	solution.py
447	Number of Boomerangs	Medium	solution.py
453	Minimum Moves to Equal Array Elements	Medium	solution.py
458	Poor Pigs	Hard	solution.py
462	Minimum Moves to Equal Array Elements II	Medium	solution.py
464	Can I Win	Medium	solution.py
469	Convex Polygon	Medium	solution.py
470	Implement Rand10() Using Rand7()	Medium	solution.py
477	Total Hamming Distance	Medium	solution.py
478	Generate Random Point in a Circle	Medium	solution.py
479	Largest Palindrome Product	Hard	solution.py
483	Smallest Good Base	Hard	solution.py
486	Predict the Winner	Medium	solution.py
492	Construct the Rectangle	Easy	solution.py
497	Random Point in Non-overlapping Rectangles	Medium	solution.py
504	Base 7	Easy	solution.py
507	Perfect Number	Easy	solution.py
509	Fibonacci Number	Easy	solution.py
519	Random Flip Matrix	Medium	solution.py
523	Continuous Subarray Sum	Medium	solution.py
528	Random Pick with Weight	Medium	solution.py
537	Complex Number Multiplication	Medium	solution.py
539	Minimum Time Difference	Medium	solution.py
553	Optimal Division	Medium	solution.py
556	Next Greater Element III	Medium	solution.py
564	Find the Closest Palindrome	Hard	solution.py
573	Squirrel Simulation	Medium	solution.py
587	Erect the Fence	Hard	solution.py
592	Fraction Addition and Subtraction	Medium	solution.py
593	Valid Square	Medium	solution.py
598	Range Addition II	Easy	solution.py
625	Minimum Factorization	Medium	solution.py
628	Maximum Product of Three Numbers	Easy	solution.py
633	Sum of Square Numbers	Medium	solution.py
634	Find the Derangement of An Array	Medium	solution.py
640	Solve the Equation	Medium	solution.py
650	2 Keys Keyboard	Medium	solution.py
651	4 Keys Keyboard	Medium	solution.py
660	Remove 9	Hard	solution.py
667	Beautiful Arrangement II	Medium	solution.py
668	Kth Smallest Number in Multiplication Table	Hard	solution.py
670	Maximum Swap	Medium	solution.py
672	Bulb Switcher II	Medium	solution.py
679	24 Game	Hard	solution.py
710	Random Pick with Blacklist	Hard	solution.py
728	Self Dividing Numbers	Easy	solution.py
738	Monotone Increasing Digits	Medium	solution.py
750	Number Of Corner Rectangles	Medium	solution.py
754	Reach a Number	Medium	solution.py
762	Prime Number of Set Bits in Binary Representation	Easy	solution.py
770	Basic Calculator IV	Hard	solution.py
775	Global and Local Inversions	Medium	solution.py
779	K-th Symbol in Grammar	Medium	solution.py
780	Reaching Points	Hard	solution.py
781	Rabbits in Forest	Medium	solution.py
782	Transform to Chessboard	Hard	solution.py
788	Rotated Digits	Medium	solution.py
789	Escape The Ghosts	Medium	solution.py
793	Preimage Size of Factorial Zeroes Function	Hard	solution.py
800	Similar RGB Color	Easy	solution.py
808	Soup Servings	Medium	solution.py
810	Chalkboard XOR Game	Hard	solution.py
812	Largest Triangle Area	Easy	solution.py
829	Consecutive Numbers Sum	Hard	solution.py
836	Rectangle Overlap	Easy	solution.py
837	New 21 Game	Medium	solution.py
840	Magic Squares In Grid	Medium	solution.py
843	Guess the Word	Hard	solution.py
858	Mirror Reflection	Medium	solution.py
866	Prime Palindrome	Medium	solution.py
869	Reordered Power of 2	Medium	solution.py
877	Stone Game	Medium	solution.py
878	Nth Magical Number	Hard	solution.py
883	Projection Area of 3D Shapes	Easy	solution.py
887	Super Egg Drop	Hard	solution.py
891	Sum of Subsequence Widths	Hard	solution.py
892	Surface Area of 3D Shapes	Easy	solution.py
899	Orderly Queue	Hard	solution.py
902	Numbers At Most N Given Digit Set	Hard	solution.py
906	Super Palindromes	Hard	solution.py
908	Smallest Range I	Easy	solution.py
910	Smallest Range II	Medium	solution.py
913	Cat and Mouse	Hard	solution.py
914	X of a Kind in a Deck of Cards	Easy	solution.py
920	Number of Music Playlists	Hard	solution.py
927	Three Equal Parts	Hard	solution.py
932	Beautiful Array	Medium	solution.py
939	Minimum Area Rectangle	Medium	solution.py
952	Largest Component Size by Common Factor	Hard	solution.py
957	Prison Cells After N Days	Medium	solution.py
963	Minimum Area Rectangle II	Medium	solution.py
964	Least Operators to Express Number	Hard	solution.py
970	Powerful Integers	Medium	solution.py
972	Equal Rational Numbers	Hard	solution.py
973	K Closest Points to Origin	Medium	solution.py
976	Largest Perimeter Triangle	Easy	solution.py
989	Add to Array-Form of Integer	Easy	solution.py
991	Broken Calculator	Medium	solution.py
996	Number of Squareful Arrays	Hard	solution.py
1041	Robot Bounded In Circle	Medium	solution.py
1056	Confusing Number	Easy	solution.py
1058	Minimize Rounding Error to Meet Target	Medium	solution.py
1071	Greatest Common Divisor of Strings	Easy	solution.py
1088	Confusing Number II	Hard	solution.py
1134	Armstrong Number	Easy	solution.py
1137	N-th Tribonacci Number	Easy	solution.py
1140	Stone Game II	Medium	solution.py
1180	Count Substrings with Only One Distinct Letter	Easy	solution.py
1183	Maximum Number of Ones	Hard	solution.py
1215	Stepping Numbers	Medium	solution.py
1228	Missing Number In Arithmetic Progression	Easy	solution.py
1230	Toss Strange Coins	Medium	solution.py
1248	Count Number of Nice Subarrays	Medium	solution.py
1259	Handshakes That Don’t Cross	Hard	solution.py
1359	Count All Valid Pickup and Delivery Options	Hard	solution.py
1406	Stone Game III	Hard	solution.py
1427	Perform String Shifts	Easy	solution.py
1442	Count Triplets That Can Form Two Arrays of Equal XOR	Medium	solution.py
1512	Number of Good Pairs	Easy	solution.py
1518	Water Bottles	Easy	solution.py
1523	Count Odd Numbers in an Interval Range	Easy	solution.py
1524	Number of Sub-arrays With Odd Sum	Medium	solution.py
1538	Guess the Majority in a Hidden Array	Medium	solution.py
1611	Minimum One Bit Operations to Make Integers Zero	Hard	solution.py
1685	Sum of Absolute Differences in a Sorted Array	Medium	solution.py
1688	Count of Matches in Tournament	Easy	solution.py
1716	Calculate Money in Leetcode Bank	Easy	solution.py
1780	Check if Number is a Sum of Powers of Three	Medium	solution.py

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Math in Python with Tests