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Random
Hot problems
Educational DP Contest AtCoder K - Stones
Educational DP Contest AtCoder I - Coins
DMOPC '20 Contest 4 P1 - Missing Numbers
CCC '12 S3 - Absolutely Acidic
CCC '21 J3 - Secret Instructions
DWITE '07 R3 #4 - The Convex Fence Company
CCC '24 J5 - Harvest Waterloo
Problem
Category
Points
AC %
Users ▾
CCC '07 S3 - Friends
CCC
7
37.5%
1698
CCC '20 S2 - Escape Room
CCC
10p
12.8%
1691
CCC '05 S2 - Mouse Move
CCC
5
37.2%
1684
CCC '16 J4 - Arrival Time
CCC
5
29.0%
1680
CCC '23 J2 - Chili Peppers
CCC
3p
53.5%
1623
CCC '03 J2 - Picture Perfect
CCC
3p
23.9%
1613
CCC '18 J5 - Choose your own path
CCC
7p
24.1%
1611
CCC '09 J2 - Old Fishin' Hole
CCC
5
39.2%
1585
CCC '10 S2 - Huffman Encoding
CCC
5
53.6%
1573
CCC '17 J4 - Favourite Times
CCC
5p
23.4%
1569
CCC '08 S3 - Maze
CCC
7
29.3%
1561
CCC '22 S2 - Good Groups
CCC
5p
26.1%
1556
CCC '11 J4 - Boring Business
CCC
7
27.8%
1508
CCC '01 S1 - Keeping Score
CCC
5
32.7%
1502
CCC '07 S4 - Waterpark
CCC
7
30.9%
1499
CCC '02 S1 - The Students' Council Breakfast
CCC
5
39.5%
1495
CCC '22 J3 - Harp Tuning
CCC
5p
33.3%
1492
CCC '98 S1 - Censor
CCC
5
37.6%
1473
CCC '05 J5 - Bananas
CCC
10
21.6%
1468
CCC '06 J3 - Cell-Phone Messaging
CCC
3
41.3%
1464
CCC '15 J5 - π-day
CCC
10p
27.4%
1463
CCC '01 S3 - Strategic Bombing
CCC
7
38.7%
1456
CCC '03 S2 - Poetry
CCC
5
17.3%
1454
CCC '05 J1 - The Cell Sell
CCC
3
8.0%
1451
CCC '10 J3 - Punchy
CCC
5
33.0%
1397
CCC '09 J3 - Good Times
CCC
5
20.3%
1381
CCC '13 S3 - Chances of Winning
CCC
10
41.2%
1364
CCC '00 J1 - Calendar
CCC
5
11.2%
1354
CCC '09 S3 - Degrees Of Separation
CCC
10
28.0%
1346
CCC '08 J3 - GPS Text Entry
CCC
3
56.0%
1339
CCC '10 S1 - Computer Purchase
CCC
5
14.1%
1323
CCC '21 J4 - Arranging Books
CCC
7p
19.6%
1321
CCC '15 J4 - Wait Time
CCC
5
39.4%
1311
CCC '23 J3 - Special Event
CCC
5p
38.2%
1270
CCC '06 J4 - It's tough being a teen!
CCC
7
41.5%
1242
CCC '13 S4 - Who is Taller?
CCC
7
16.8%
1231
CCC '07 S2 - Boxes
CCC
5
27.5%
1211
CCC '04 S1 - Fix
CCC
5
32.6%
1198
CCC '11 S3 - Alice Through the Looking Glass
CCC
10p
36.0%
1195
CCC '08 S2 - Pennies in the Ring
CCC
5
30.5%
1183
CCC '15 S4 - Convex Hull
CCC
15p
27.4%
1159
CCC '06 S1 - Maternity
CCC
5
37.5%
1146
CCC '18 S3 - RoboThieves
CCC
12p
14.1%
1135
CCC '16 S3 - Phonomenal Reviews
CCC
12p
26.4%
1104
CCC '07 J5 - Keep on Truckin'
CCC
7
19.7%
1069
CCC '10 J4 - Global Warming
CCC
5p
22.5%
1055
CCC '09 S4 - Shop and Ship
CCC
10
21.0%
1030
CCC '97 S1 - Sentences
CCC
5
29.4%
1019
CCC '21 S3 - Lunch Concert
CCC
10p
24.5%
1017
CCC '11 J5 - Unfriend
CCC
7
46.8%
1003
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