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3739 Petya and Divisors binary search data structures number theory Statement B Codeforces Beta Round 85 (Div. 1 Only) {111} PROGRAMMING Codeforces Beta Round #85: Разбор задач 1900
9806 Bear and Prime Numbers binary search brute force data structures dp implementation math number theory Statement C Codeforces Round 226 (Div. 2) {385} PROGRAMMING Codeforces Round #226 (Div. 2) — Editorial 1800
349 Maximum Sine binary search data structures number theory Statement F Codeforces Round 566 (Div. 2) {1182} PROGRAMMING 67614 2900