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14518 Belted Rooms graphs implementation Statement B Codeforces Raif Round 1 (Div. 1 + Div. 2) {1428} PROGRAMMING 1000.0 Codeforces Raif Round 1 Editorial
371 Kingdom of Islands graphs implementation Statement K ICPC WF Moscow Invitational Contest - Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1578} PROGRAMMING Tutorial (PDF)