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Random
Hot problems
CCC '16 S4 - Combining Riceballs
Appleby Contest '19 P5 - Matrix Operation
CCC '24 S2 - Heavy-Light Composition
EGOI '23 P4 - Bikes vs Cars
Cheerio Contest 1 S2 - School Expansion
WC '96 P6 - Bases Multiplication
Vending Machine
Problem
Category ▾
Points
AC %
Users
CCC '02 J1 - 0123456789
CCC
3
5.4%
722
CCC '02 J2 - AmeriCanadian
CCC
3
25.0%
3881
CCC '02 S1 - The Students' Council Breakfast
CCC
5
39.6%
1498
CCC '02 S2 - Fraction Action
CCC
5
19.0%
1884
CCC '07 S2 - Boxes
CCC
5
27.5%
1214
CCC '07 S3 - Friends
CCC
7
37.5%
1703
CCC '07 S4 - Waterpark
CCC
7
30.9%
1502
CCC '15 S1 - Zero That Out
CCC
3
51.0%
3880
CCC '15 S2 - Jerseys
CCC
5p
26.7%
1957
CCC '15 S3 - Gates
CCC
10p
18.7%
1778
CCC '15 S4 - Convex Hull
CCC
15p
27.4%
1160
CCC '15 S5 - Greedy For Pies
CCC
17p
23.5%
555
CCC '15 J1 - Special Day
CCC
3
36.9%
8386
CCC '15 J2 - Happy or Sad
CCC
3
37.1%
7071
CCC '15 J3 - Rövarspråket
CCC
5p
38.5%
2268
CCC '15 J4 - Wait Time
CCC
5
39.4%
1314
CCC '15 J5 - π-day
CCC
10p
27.4%
1465
CCC '01 J1 - Dressing Up
CCC
3
48.2%
2874
CCC '01 J2 - Mod Inverse
CCC
3
42.9%
2535
CCC '16 S1 - Ragaman
CCC
3p
29.7%
2302
CCC '16 S2 - Tandem Bicycle
CCC
5p
53.2%
3502
CCC '16 S4 - Combining Riceballs
CCC
15p
28.8%
944
CCC '16 S3 - Phonomenal Reviews
CCC
12p
26.4%
1103
CCC '16 S5 - Circle of Life
CCC
20p
22.5%
578
CCC '16 J1 - Tournament Selection
CCC
3
41.2%
4715
CCC '16 J2 - Magic Squares
CCC
3
34.6%
3250
CCC '16 J3 - Hidden Palindrome
CCC
5
45.9%
2556
CCC '16 J4 - Arrival Time
CCC
5
29.1%
1682
CCOQR '16 - Stupendous Bowties
CCC
10p
31.8%
247
CCOQR '16 - Through A Maze Darkly
CCC
20p
18.4%
104
CCOQR '16 - Data Structure
CCC
15p
22.1%
177
CCCHK '15 J1 - Rock-paper-scissors
CCC
3
51.7%
852
CCCHK '15 J2 - What is the minimum area?
CCC
5
35.7%
267
CCCHK '15 J3 - Queens can't attack me!
CCC
5
51.1%
613
CCCHK '15 J4 - Where to build my house?
CCC
5
17.9%
262
CCCHK '15 J5 - No friends in the same group.
CCC
15p
9.8%
33
CCC '05 S3 - Quantum Operations
CCC
10p
34.8%
439
CCC '05 S4 - Pyramid Message Scheme
CCC
10
35.7%
819
CCC '01 S4 - Cookies
CCC
10
19.2%
418
CCC '05 J4 - Cross Spiral
CCC
7p
32.6%
580
CCC '01 S5 - Post's Correspondence Problem
CCC
10
28.9%
315
CCC '96 S2 - Divisibility by 11
CCC
7
6.8%
179
CCC '96 S5 - Maximum Distance
CCC
7
25.4%
417
CCC '96 S3 - Pattern Generator
CCC
5
11.0%
355
CCC '98 S2 - Cross Number Puzzle
CCC
5
43.1%
495
CCC '01 S3 - Strategic Bombing
CCC
7
38.7%
1458
CCC '01 S1 - Keeping Score
CCC
5
32.7%
1504
CCC '01 S2 - Spirals
CCC
5
41.2%
912
CCC '02 S3 - Blindfold
CCC
15
6.1%
150
CCC '02 S4 - Bridge Crossing
CCC
10p
37.2%
888
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