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Problem Category Points AC % Users ▾
CCC '21 S3 - Lunch Concert CCC 10p 24.6% 1017
CCC '11 J5 - Unfriend CCC 7 46.8% 1003
CCC '99 S1 - Card Game CCC 5 31.4% 998
ACM U of T Tryouts C0 A - Max Flow ICPC 3 60.4% 984
The Cosmic Era P3 - Battle Positions Uncategorized 7 30.4% 983
BlueBook - Exact Divisors BlueBook 3 64.2% 978
COCI '12 Contest 5 #1 Ljestvica COCI 5p 19.4% 974
CCO '07 P2 - Snowflakes CCO 10 14.4% 967
Mock CCC '19 Contest 1 J1 - Pusheen's Report Card Mock CCC 3p 36.1% 962
STNBD P1 - Ren Ashbell Uncategorized 3p 29.3% 944
CCC '16 S4 - Combining Riceballs CCC 15p 28.7% 932
Back To School '16: Harambe Seasonal 3p 30.5% 913
CCC '01 S2 - Spirals CCC 5 41.2% 912
Prime Factorization Uncategorized 5 25.3% 901
The Cosmic Era P2 - Uneven Sand Uncategorized 5 24.4% 898
CCC '09 S2 - Lights Going On and Off CCC 10 40.5% 897
ECOO '19 R1 P1 - Free Shirts ECOO 5p 31.1% 893
CCC '08 J4 - From Prefix to Postfix CCC 7 42.8% 887
Binary Uncategorized 5 24.1% 886
GFSSOC '14 Winter J1 - Flying Plushies GFSSOC 3p 50.6% 886
CCC '02 S4 - Bridge Crossing CCC 10p 37.2% 884
IOI '04 P4 - Phidias IOI 10p 53.5% 883
Disjoint Set Test Data Structure Tests 10 36.9% 882
DMOPC '14 Contest 1 P3 - New Students DMOPC 3p 37.6% 874
BlueBook - Direction BlueBook 3 40.8% 871
PEG Test '14 - Water Uncategorized 3 54.6% 870
COCI '06 Contest 2 #2 ABC COCI 3 45.6% 867
CCC '07 S5 - Bowling for Numbers CCC 10p 29.9% 864
DMOPC '14 Contest 3 P1 - Not Enough Users! DMOPC 3p 48.6% 858
ACM U of T Tryouts C1 A - Rock Paper Scissors Fox ICPC 3 49.3% 858
Educational DP Contest AtCoder B - Frog 2 Uncategorized 7 43.0% 852
CCCHK '15 J1 - Rock-paper-scissors CCC 3 51.8% 851
List Minimum (Easy) Uncategorized 3p 11.9% 850
ACSL '09 Practice P4 - Rank Uncategorized 7 45.8% 847
CCCHK '08 J2 - Lucky Number CCC 3 26.8% 843
ECOO '17 R1 P1 - Munch 'n' Brunch ECOO 5p 18.1% 841
CCC '20 S3 - Searching for Strings CCC 12p 8.9% 841
Longest Common Subsequence Classics 7 40.5% 836
BlueBook - Leap Year BlueBook 3 37.8% 836
IOI '00 P1 - Palindrome IOI 10p 18.5% 827
Educational DP Contest AtCoder C - Vacation Uncategorized 7 59.9% 826
Mock CCC '20 Contest 1 J1 - A Rage Tree Problem Mock CCC 3p 48.3% 821
CCC '05 S4 - Pyramid Message Scheme CCC 10 35.7% 817
CCC '23 S2 - Symmetric Mountains CCC 7p 26.6% 813
Hailstone Numbers Uncategorized 3 56.9% 806
CCCHK '08 J1 - Best fish CCC 3 38.1% 805
GFSSOC '15 Fall J4 - Marathon GFSSOC 7p 39.8% 804
VPEX P0 - Pizza Uncategorized 3p 40.2% 804
DMOPC '13 Contest 1 P4 - AFK DMOPC 7p 26.0% 802
BlueBook - Equation BlueBook 3 26.1% 797