02 2021 档案
摘要:A - A CodeForces - 991A Each student eagerly awaits the day he would pass the exams successfully. Thus, Vasya was ready to celebrate, but, alas, he di
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摘要:A - A CodeForces - 994A You are locked in a room with a door that has a keypad with 10 keys corresponding to digits from 0 to 9. To escape from the ro
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