https://leetcode.com/problems/relative-ranks/description/

Convert results array to ranks array #easy #sorting

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/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/most-profit-assigning-work/description/

Max profit by assigning [profit, difficulty] to workers any times #medium #sorting #greedy

https://leetcode.com/problems/maximum-width-ramp/description/


Max j-i between a[i] <= a[j] in array #medium #monotonic_stack #sorting

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

https://leetcode.com/problems/divide-intervals-into-minimum-number-of-groups/description/


Count non-intersecting groups of intervals #medium #heap #sorting

https://leetcode.com/problems/minimum-total-distance-traveled/description/


Min robots[x] travel to factories[x,capacity] #hard #dynamic_programming #sorting

https://leetcode.com/problems/count-number-of-bad-pairs/description/


Count pairs a[i] - a[j] != j - i #medium #counting #sorting

All numbers in pairs #easy #counting #sorting


https://leetcode.com/problems/divide-array-into-equal-pairs/description/