Codeforces 1051F. The Shortest Statement (Shortest Path + LCA) 日付: 12月 20, 2018 codeforces dfs dsu graphs trees +
Codeforces 1065F. Up and Down the Tree (DP + Tree + Greedy) 日付: 12月 19, 2018 codeforces dp greedy trees +
Codeforces 1093E. Intersection of Permutations (Divide and Conquer + Fenwick Tree) 日付: 12月 16, 2018 codeforces data structures divide and conquer +
Codeforces 1093G. Multidimensional Queries (Manhattan Distance + Segment Tree) 日付: 12月 16, 2018 codeforces data structures geometry +
Codeforces 1083E. The Fair Nut and Rectangles (DP+Convex-Hull Trick) 日付: 12月 11, 2018 codeforces dp +