Problems Problem search Full text search Show problem types Category All --- ACM-ICPC APIO Bubble Cup CCC CCO CEOI Classics COCI CSPC Data Structure Tests DMOPC DWITE ECOO FHC Fun Math GCJ GFSSOC IOI JOI Mock CCC MWC Seasonal SIUCF TLE TSOC Uncategorized VM7WC GoRandom Hot problems Summer Institute '17 Contest 1 #1 - Ant Clans CCC '15 J4 - Wait Time THICC '17 P4 - Kenta's Neural Networks CCC '13 S2 - Bridge Transport CCC '14 S4 - Tinted Glass Window CCC '11 S2 - Multiple Choice CCC '10 S2 - Huffman Encoding « 1 2 3 4 5 6 ... 26 27 » Problem Category Points AC % Users CCC '09 J3 - Good Times CCC 5 19.7% 144 CCC '09 J4 - Signage CCC 7 31.3% 67 CCC '09 J5 - Degrees Of Separation CCC 10 25.7% 139 CCC '09 S1 - Cool Numbers CCC 5 22.5% 262 CCC '09 S2 - Lights Going on and Off CCC 10 45.2% 62 CCC '09 S4 - Shop and Ship CCC 15 9.4% 96 CCC '09 S5 - Wireless CCC 15p 25.1% 113 CCC '10 J1 - What is n, Daddy? CCC 3 35.0% 504 CCC '10 J2 - Up and Down CCC 5 22.5% 161 CCC '10 J3 - Punchy CCC 5 40.4% 143 CCC '10 J4 - Global Warming CCC 10p 18.8% 124 CCC '10 J5 - Knight Hop CCC 10 41.2% 231 CCC '10 S1 - Computer Purchase CCC 5 15.8% 136 CCC '10 S2 - Huffman Encoding CCC 5 54.6% 120 CCC '10 S3 - Firehose CCC 15p 12.3% 70 CCC '10 S4 - Animal Farm CCC 15p 29.1% 70 CCC '10 S5 - Nutrient Tree CCC 20p 17.4% 46 CCC '11 J1 - Which Alien? CCC 3 36.7% 690 CCC '11 J2 - Who Has Seen The Wind CCC 5 31.4% 250 CCC '11 J3 - Sumac Sequences CCC 5 41.9% 243 CCC '11 J4 - Boring Business CCC 7 34.9% 132 CCC '11 J5 - Unfriend CCC 7 45.9% 98 CCC '11 S1 - English or French? CCC 5 41.5% 354 CCC '11 S2 - Multiple Choice CCC 5 59.0% 462 CCC '11 S3 - Alice Through the Looking Glass CCC 10p 32.2% 122 CCC '11 S4 - Blood Distribution CCC 10 35.3% 94 CCC '11 S5 - Switch CCC 12p 12.4% 71 CCC '12 J1 - Speed fines are not fine! CCC 3 28.6% 724 CCC '12 J2 - Sounds fishy! CCC 3 32.9% 492 CCC '12 J3 - Icon Scaling CCC 3 63.7% 357 CCC '12 J4 - Big Bang Secrets CCC 3 60.8% 226 CCC '12 S1 - Don't pass me the ball! CCC 3 56.6% 263 CCC '12 S2 - Aromatic Numbers CCC 5 52.8% 128 CCC '12 S3 - Absolutely Acidic CCC 7 19.5% 137 CCC '12 S4 - A Coin Game CCC 15 19.0% 48 CCC '12 S5 - Mouse Journey CCC 10 40.1% 205 CCC '13 J1 - Next in line CCC 3 69.5% 965 CCC '13 J2 - Rotating letters CCC 5 46.0% 450 CCC '13 J3 - From 1987 to 2013 CCC 5 43.5% 292 CCC '13 J4 - Time on task CCC 5 52.9% 241 CCC '13 S2 - Bridge Transport CCC 5 23.7% 176 CCC '13 S3 - Chances of Winning CCC 12 41.0% 119 CCC '13 S4 - Who is Taller? CCC 10 18.4% 160 CCC '13 S5 - Factor Solitaire CCC 15p 38.5% 102 CCC '14 J1 - Triangle Times CCC 3 32.3% 833 CCC '14 J2 - Vote Count CCC 3 45.6% 612 CCC '14 J3 - Double Dice CCC 3 62.1% 411 CCC '14 S1 - Party Invitation CCC 5 44.7% 316 CCC '14 S2 - Assigning Partners CCC 5 36.2% 270 CCC '14 S3 - The Geneva Confection CCC 7p 21.2% 304 « 1 2 3 4 5 6 ... 26 27 »