Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users
HCI '16 - Boxception Uncategorized 10p 48.6% 8
HCI '16 - Serial Killer Uncategorized 15p 29.2% 42
HCI '16 - Cheese Uncategorized 5p 38.4% 23
HCI '16 - Computation Uncategorized 0 3.6% 3
HCI '16 - Danger Room Uncategorized 7p 16.3% 25
HCI '16 - Foodie Uncategorized 7p 30.7% 62
HCI '16 - Gifts Uncategorized 17p 33.3% 10
HCI '16 - Hearing Uncategorized 15p 18.8% 6
HCI '16 - HelloWorld_ex Uncategorized 0p 47.1% 319
HCI '16 - Jumping Uncategorized 20 13.2% 83
HCI '16 - Lamppost Uncategorized 5p 28.5% 110
HCI '16 - lvm_ex Uncategorized 10p 10.4% 6
HCI '16 - Moana Uncategorized 15p 0.0% 0
HCI '16 - Oversleep Uncategorized 7p 45.4% 568
HCI '16 - Penguin Food Uncategorized 15p 19.6% 44
HCI '16 - Pi Digits Uncategorized 30 0.2% 1
HCI '16 - Poké Problem Uncategorized 7 57.5% 19
HCI '16 - Cheapest Operation Ever Uncategorized 20p 28.6% 207
HCI '16 - Redstone Repeaters Uncategorized 10p 2.3% 10
HCI '16 - Sentence Checker Uncategorized 3p 23.0% 116
HCI '16 - Stacker Uncategorized 15p 14.7% 31
HCI '16 - Taxi Uncategorized 10p 24.2% 46
HCI '16 - Totient Uncategorized 12p 27.1% 19
HCI '16 - Unexpected Factorial Uncategorized 5p 28.4% 86
HCI '16 - Ulam Spiral Uncategorized 5p 17.3% 40
HCI '16 - Wizardry Uncategorized 7 5.2% 19
HCI '16 - Xorpow Uncategorized 10p 23.9% 92
The Heist Uncategorized 10p 24.5% 21
Hello, World! Uncategorized 3 56.3% 12805
Hello, World! (Hard) Uncategorized 0 6.4% 615
HHPC1 P1 - Yielding the Longest Substring Uncategorized 5 22.5% 225
HHPC1 P2 - Yuniformity Challenge Uncategorized 10p 12.9% 127
HHPC1 P3 - Yonder Ridge Uncategorized 12p 11.4% 32
HHPC1 P4 - Yet Another A+B Problem Uncategorized 10p 12.1% 118
HHPC1 P5 - Yunity Grouping Objects Uncategorized 17p 34.9% 14
HHPC1 P6 - Yarn Street's Strategic Shopping Uncategorized 20p 8.4% 5
CCCHK '08 J1 - Best fish CCC 3 38.8% 856
CCCHK '08 J2 - Lucky Number CCC 3 26.5% 895
CCCHK '08 J3 - Phone book CCC 5p 35.0% 687
CCCHK '08 J4 - Tic-tac-toe CCC 5p 11.7% 119
CCCHK '15 J1 - Rock-paper-scissors CCC 3 51.8% 879
CCCHK '15 J2 - What is the minimum area? CCC 5 35.8% 282
CCCHK '15 J3 - Queens can't attack me! CCC 5 51.0% 652
CCCHK '15 J4 - Where to build my house? CCC 5 18.5% 287
CCCHK '15 J5 - No friends in the same group. CCC 15p 9.7% 33
CCCHK '15 S1 - Finding number of pairs CCC 7p 14.3% 162
CCCHK '15 S2 - Matching Problem CCC 10p 5.6% 22
CCCHK '15 S3 - Symmetric Cross CCC 12p 16.8% 23
CCCHK '15 S4 - When to meet? CCC 15p 21.7% 10
CCCHK '15 S5 - Can I pass the courses? CCC 25p 4.7% 6