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September 9, 2014

Codeforces Round #265

August 27, 2014

Codeforces Round #263

October 25, 2013

ABBYY Cup 3.0 G3. Good Substrings

October 17, 2013

Codeforces Round #207

June 27, 2013

Codeforces Beta Round 43

June 25, 2013

Codeforces Round #189

April 12, 2013

Codeforces Round #179

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