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Discussion of Problem 1403. Courier

Umm, I just used the method which you will use when you face this problem as an elementary school maths exercise.
Posted by some_programming_novice 15 Apr 2019 08:10
1. sort these orders for the following for loop;
2. can I serve current order? is there a not used day left for it? wow, that's easy if I can use std::set::upper_bound;
3. output our selected orders with delivery time.

// wow accepted, so lucky I am.

// after checked the discussion, found that this problem can be easily solve with priority queue, looks that priority queue is more convenient.