https://leetcode.com/problems/find-numbers-with-even-number-of-digits/description/


Even length numbers #easy

Tasks can be done by workers with pills #hard #binary_search


https://leetcode.com/problems/maximum-number-of-tasks-you-can-assign/description

Dominoes simulation #medium


https://leetcode.com/problems/push-dominoes/description/

https://leetcode.com/problems/minimum-domino-rotations-for-equal-row/description/


Min swaps to make a top or bottom row #medium

Dominoes pairs #easy #hash

https://leetcode.com/problems/number-of-equivalent-domino-pairs/description/

Ways to fill 2xn board with I,L shapes #medium #dp


https://leetcode.com/problems/domino-and-tromino-tiling/description/

n[n[i]] #easy


https://leetcode.com/problems/build-array-from-permutation/description/

https://leetcode.com/problems/find-minimum-time-to-reach-last-room-i/description


Fastest path in graph #medium #bfs

https://leetcode.com/problems/find-minimum-time-to-reach-last-room-ii/description/


Fastest travel in graph, alternating dt=1,2 #medium #bfs

Permutations of even-odd position sums equal #hard #dp #math


https://leetcode.com/problems/count-number-of-balanced-permutations/description/

https://leetcode.com/problems/minimum-equal-sum-of-two-arrays-after-replacing-zeros/description/


Min equal array sum, fill zeros #medium

3 odds #easy #bitmask


https://leetcode.com/problems/three-consecutive-odds/description/

Triple digit even numbers from digits #easy #backtrack


https://leetcode.com/problems/finding-3-digit-even-numbers/description

String length after t shifts c=c+1,z=ab #medium #dp



https://leetcode.com/problems/total-characters-in-string-after-transformations-i/description

t steps to convert char into next nums[c] chars #hard #dp #math


https://leetcode.com/problems/total-characters-in-string-after-transformations-ii/description

https://leetcode.com/problems/longest-unequal-adjacent-groups-subsequence-i/description


Longest subsequence alterating g #easy #gready

https://leetcode.com/problems/longest-unequal-adjacent-groups-subsequence-ii/description


Longest subsequence humming distance 1, alterating groups #medium #dp

https://leetcode.com/problems/sort-colors/description


Sort 0,1,2 array #medium #two_pointers

https://leetcode.com/problems/painting-a-grid-with-three-different-colors/description


Ways to 3-color m*n grid, no adjucents #hard #dp #matrix

https://leetcode.com/problems/type-of-triangle/description/

Triangle type by lengths #easy