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340D - Bubble Sort Graph (Codeforces - Codeforces Round #198 (Div. 2) & Codeforces Round #198 (Div. 1)) categories

Category Problems Count
1 Dynamic Programming 1222
2 data structures 496
3 Codeforces Div. 2 - D Problems 443
4 Binary Search & Ternary Search 352
5 LIS 21