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Problem Category Points AC % Users ▾
CCC '21 S3 - Lunch Concert CCC 10p 24.6% 1019
CCC '11 J5 - Unfriend CCC 7 46.8% 1003
CCC '99 S1 - Card Game CCC 5 31.3% 1001
CCO '07 P2 - Snowflakes CCO 10 14.6% 990
The Cosmic Era P3 - Battle Positions Uncategorized 7 30.5% 988
ACM U of T Tryouts C0 A - Max Flow ICPC 3 60.4% 985
COCI '12 Contest 5 #1 Ljestvica COCI 5p 19.3% 984
BlueBook - Exact Divisors BlueBook 3 64.2% 979
Mock CCC '19 Contest 1 J1 - Pusheen's Report Card Mock CCC 3p 36.1% 970
CCC '16 S4 - Combining Riceballs CCC 15p 28.8% 947
STNBD P1 - Ren Ashbell Uncategorized 3p 29.3% 945
The Cosmic Era P2 - Uneven Sand Uncategorized 5 24.6% 926
Back To School '16: Harambe Seasonal 3p 30.5% 913
CCC '01 S2 - Spirals CCC 5 41.2% 912
Prime Factorization Uncategorized 5 25.2% 904
ECOO '19 R1 P1 - Free Shirts ECOO 5p 31.2% 903
CCC '09 S2 - Lights Going On and Off CCC 10 40.6% 902
CCC '08 J4 - From Prefix to Postfix CCC 7 42.8% 890
CCC '02 S4 - Bridge Crossing CCC 10p 37.3% 890
IOI '04 P4 - Phidias IOI 10p 53.6% 890
Binary Uncategorized 5 24.1% 889
GFSSOC '14 Winter J1 - Flying Plushies GFSSOC 3p 50.7% 889
Disjoint Set Test Data Structure Tests 10 37.1% 885
DMOPC '14 Contest 1 P3 - New Students DMOPC 3p 37.5% 877
BlueBook - Direction BlueBook 3 40.8% 871
PEG Test '14 - Water Uncategorized 3 54.6% 870
CCC '07 S5 - Bowling for Numbers CCC 10p 29.9% 868
COCI '06 Contest 2 #2 ABC COCI 3 45.6% 868
Educational DP Contest AtCoder B - Frog 2 Uncategorized 7 43.1% 862
DMOPC '14 Contest 3 P1 - Not Enough Users! DMOPC 3p 48.6% 860
ACM U of T Tryouts C1 A - Rock Paper Scissors Fox ICPC 3 49.3% 859
CCCHK '15 J1 - Rock-paper-scissors CCC 3 51.6% 855
ACSL '09 Practice P4 - Rank Uncategorized 7 45.9% 855
List Minimum (Easy) Uncategorized 3p 11.9% 852
ECOO '17 R1 P1 - Munch 'n' Brunch ECOO 5p 17.9% 847
CCCHK '08 J2 - Lucky Number CCC 3 26.8% 846
CCC '20 S3 - Searching for Strings CCC 12p 8.9% 843
Longest Common Subsequence Classics 7 40.6% 838
BlueBook - Leap Year BlueBook 3 37.8% 838
Educational DP Contest AtCoder C - Vacation Uncategorized 7 59.6% 832
IOI '00 P1 - Palindrome IOI 10p 18.5% 830
Mock CCC '20 Contest 1 J1 - A Rage Tree Problem Mock CCC 3p 48.3% 826
CCC '05 S4 - Pyramid Message Scheme CCC 10 35.7% 819
CCC '23 S2 - Symmetric Mountains CCC 7p 26.6% 815
Hailstone Numbers Uncategorized 3 57.0% 807
CCCHK '08 J1 - Best fish CCC 3 38.1% 806
VPEX P0 - Pizza Uncategorized 3p 40.2% 805
GFSSOC '15 Fall J4 - Marathon GFSSOC 7p 39.8% 804
DMOPC '13 Contest 1 P4 - AFK DMOPC 7p 26.0% 802
BlueBook - Equation BlueBook 3 26.1% 798