ID Problem Show tags Hide tags AC / Tried Difficulty
6890 P661D  Maximal Difference 0 / 0 7
6887 P661E  Divisibility Check 0 / 0 7
6886 P661F  Primes in Interval 0 / 0 6
6884 P661G  Hungarian Notation 0 / 0 8
6882 P661H  Rotate Matrix 0 / 0 9
6881 P662A  Gambling Nim 0 / 0 9
6880 P662B  Graph Coloring 0 / 0 8
6879 P662C  Binary Table 0 / 0 10
6878 P662D  International Olympiad 0 / 0 7
6877 P662E  To Hack or not to Hack 0 / 0 10
6876 P663A  Rebus 0 / 0 6
6875 P664A  Complicated GCD 0 / 0 3
6874 P665A  Buses Between Cities 0 / 0 5
6873 P665B  Shopping 0 / 0 4
6872 P665C  Simple Strings 0 / 0 4
6871 P665D  Simple Subset 0 / 0 6
6870 P665E  Beautiful Subarrays 0 / 0 7
6869 P665F  Four Divisors 0 / 0 9
6868 P666A  Reberland Linguistics 0 / 0 6
6867 P666B  World Tour 0 / 0 7
6866 P666C  Codeword 0 / 0 9
6865 P666D  Chain Reaction 0 / 0 10
6864 P666E  Forensic Examination 0 / 0 10
6863 P667A  Pouring Rain 0 / 0 3
6862 P667B  Coat of Anticubism 0 / 0 3
6861 P669A  Little Artem and Presents 0 / 0 3
6860 P670A  Holidays 0 / 0 3
6859 P670B  Game of Robots 0 / 0 3
6858 P670C  Cinema 0 / 0 4
6857 P670D1  Magic Powder - 1 0 / 0 4
6856 P670D2  Magic Powder - 2 0 / 0 5
6855 P670E  Correct Bracket Sequence Editor 0 / 0 5
6854 P670F  Restore a Number 0 / 0 8
6853 P671A  Recycling Bottles 0 / 0 6
6852 P671B  Robin Hood 0 / 0 7
6851 P671C  Ultimate Weirdness of an Array 0 / 0 10
6850 P671D  Roads in Yusland 0 / 0 10
6849 P671E  Organizing a Race 0 / 0 10
6848 P672A  Summer Camp 0 / 0 3
6847 P672B  Different is Good 0 / 0 3
6846 P673A  Bear and Game 0 / 0 3
6845 P673B  Problems for Round 0 / 0 4
6844 P675A  Infinite Sequence 0 / 0 3
6843 P675B  Restoring Painting 0 / 0 4
6842 P675C  Money Transfers 0 / 0 7
6841 P675D  Tree Construction 0 / 0 6
6840 P675E  Trains and Statistic 0 / 0 8
6839 P676A  Nicholas and Permutation 0 / 0 3
6838 P676B  Pyramid of Glasses 0 / 0 5
6837 P676C  Vasya and String 0 / 0 5
6836 P676D  Theseus and labyrinth 0 / 0 7
6835 P676E  The Last Fight Between Human and AI 0 / 0 9
6834 P677A  Vanya and Fence 0 / 0 3
6833 P677B  Vanya and Food Processor 0 / 0 4
6832 P677C  Vanya and Label 0 / 0 5
6831 P677D  Vanya and Treasure 0 / 0 8
6830 P677E  Vanya and Balloons 0 / 0 8
6829 P678A  Johny Likes Numbers 0 / 0 3
6828 P678B  The Same Calendar 0 / 0 5
6827 P678C  Joty and Chocolate 0 / 0 5
6826 P678D  Iterated Linear Function 0 / 0 5
6825 P678E  Another Sith Tournament 0 / 0 8
6824 P678F  Lena and Queries 0 / 0 9
6823 P679A  Bear and Prime 100 0 / 0 4
6822 P679B  Bear and Tower of Cubes 0 / 0 8
6821 P679C  Bear and Square Grid 0 / 0 9
6820 P679D  Bear and Chase 0 / 0 10
6819 P679E  Bear and Bad Powers of 42 0 / 0 10
6818 P680A  Bear and Five Cards 0 / 0 3
6817 P680B  Bear and Finding Criminals 0 / 0 3
6816 P681A  A Good Contest 0 / 0 3
6815 P681B  Economy Game 0 / 0 4
6814 P681C  Heap Operations 0 / 0 5
6813 P681D  Gifts by the List 0 / 0 7
6812 P681E  Runaway to a Shadow 0 / 0 9
6811 P682A  Alyona and Numbers 0 / 0 3
6810 P682B  Alyona and Mex 0 / 0 4
6809 P682C  Alyona and the Tree 0 / 0 5
6808 P682D  Alyona and Strings 0 / 0 6
6807 P682E  Alyona and Triangles 0 / 0 10
6806 P683A  The Check of the Point 0 / 0 4
6805 P683B  The Teacher of Physical Education 0 / 0 5
6804 P683C  Symmetric Difference 0 / 0 5
6803 P683D  Chocolate Bar 0 / 0 4
6802 P683E  Hammer throwing 0 / 0 6
6801 P683F  Reformat the String 0 / 0 6
6800 P683G  The Fraction 0 / 0 6
6799 P683H  Exchange of Books 0 / 0 6
6798 P683I  Loader 0 / 0 9
6797 P683J  The Hero with Bombs 0 / 0 10
6796 P685A  Robbers' watch 0 / 0 5
6795 P685B  Kay and Snowflake 0 / 0 6
6794 P685C  Optimal Point 0 / 0 10
6793 P685D  Kay and Eternity 0 / 0 10
6792 P685E  Travelling Through the Snow Queen's Kingdom 0 / 0 10
6791 P686A  Free Ice Cream 0 / 0 3
6790 P686B  Little Robber Girl's Zoo 0 / 0 3
6789 P687A  NP-Hard Problem 0 / 0 5
6788 P687B  Remainders Game 0 / 0 6
6787 P687C  The Values You Can Make 0 / 0 6

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