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8204 Li Hua and Chess brute force constructive algorithms greedy hashing interactive Statement C Codeforces Round 864 (Div. 2) {1797} PROGRAMMING 1500.0 Codeforces Round 864 (Div. 2) Editorial
79 Online Palindrome brute force constructive algorithms interactive Statement F Educational Codeforces Round 177 (Rated for Div. 2) {2086} PROGRAMMING