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2100 Text Messaging expression parsing greedy strings Statement B Codeforces Beta Round 64 {70} PROGRAMMING Analysis Codeforces Beta Round #64 1600
1733 Vanya and Brackets brute force dp expression parsing greedy implementation strings Statement E Codeforces Round 308 (Div. 2) {552} PROGRAMMING Codeforces #308 (Div. 2) Editorial 2300