By Lindsey L. (11th Grade) https://codeforces.com/contest/2178/problem/D 12/30/25 Concepts: sorting, greedy We notice that whenever...
USACO
By Lindsey L. (11th Grade) https://codeforces.com/problemset/problem/126/B 12/26/25 Concepts: hashing, binary search Since we want...
By Lindsey L. (11th Grade) https://usaco.org/index.php?page=viewproblem2&cpid=1376 12/21/25 Concepts: number theory Solution: We can use...
By Lindsey L. (11th Grade) ICPC 2017 NWERC Problem I Installing Apps https://qoj.ac/problem/2640 12/23/25...
By Lindsey L. (11th Grade) https://codeforces.com/contest/2173/problem/C 12/13/25 Concepts: greedy, number theory Observations Solution: sort...
By Daniel L. (8th Grade) You can do BFS. 2 nodes i and j...
By Daniel L. (8th Grade) https://usaco.org/index.php?page=viewproblem2&cpid=1163 Since N,M <= 50, we can have a...
By Daniel L. (8th Grade) March 2021 USACO problem 2 – Portals
By Lindsey L. (10th Grade)
By Daniel L. (8th Grade) January 2025 USACO problem 1 – Median Heap
