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337E - Divisor Tree (Codeforces - Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1)) categories

Category Problems Count
1 Dynamic Programming 1201
2 brute force 493
3 Codeforces Div. 2 - E Problems 437
4 Number Theory 248
5 trees 201