https://leetcode.com/problems/maximize-happiness-of-selected-children/description/

Sum of k maximums decreasing each step #medium #sorting #heap #quickselect

https://leetcode.com/problems/k-th-smallest-prime-fraction/description/

k`th `arr[i]/arr[j], i < j, arr[i] < arr[j] #medium #heap #binary_search

https://leetcode.com/problems/minimum-cost-to-hire-k-workers/description/

Min cost of k workers each doing quality[i] work for fair rate #hard #heap #sorting

https://leetcode.com/problems/find-the-safest-path-in-a-grid/description/

Safest path in a grid with thiefs #medium #bfs #heap

https://leetcode.com/problems/hand-of-straights/description/

Can array be split into consecutive groups #medium #heap #treemap

https://leetcode.com/problems/ipo/description/

Max capital by choosing k jobs with profits[] & capital[] given w on start #hard #heap

https://leetcode.com/problems/range-sum-of-sorted-subarray-sums/description/

Sum of [left..right] of sorted subarray sums #medium #heap

https://leetcode.com/problems/kth-largest-element-in-a-stream/description/

`k`th largest in a stream of values #easy #heap

https://leetcode.com/problems/ugly-number-ii/description/

`n`th number with only [1,2,3,5] multipliers #medium #heap

https://leetcode.com/problems/the-number-of-the-smallest-unoccupied-chair/description/


target's chair number when chairs reused by multiple [arrival, leave] times #medium #sorting #heap