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PROBLEMS
STATUS
RANKS
DISCUSS
CONTESTS
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Classical
Challenge
Partial
Tutorial
Riddle
Basics
#tags
ID
NAME
QUALITY
USERS
ACC %
DIFFICULTY
C
I
4580
ABCDEF
218
7839
14
16
7386
Activities
62
1432
16
19
28404
Ada and Field
33
561
21
17
297
Aggressive cows
1069
44672
16
23
15454
How to Handle the Fans
39
1521
12
11
4560
The Double HeLiX
147
8877
11
10
28407
Busqueda Binaria
493
1
1
28467
Búsqueda Binaria 2
1
345
27380
Painting Hat
6
252
11
12
19301
Operators (new ver)
3
42
38
17
43
Copying Books
45
2794
19
19
36671
Bipartite Permutation (Hard)
6
52
32
34
14742
Building Bridges(HARD)
10
449
14
17
6168
Building Bridges
27
1649
11
17
110
Fill the Cisterns
29
1410
21
20
5296
Air Combat
-1
64
34
35669
Consecutive Letters
7
504
17
20
13780
Audition
18
646
17
17
6956
IOI2009 Mecho
3
163
28
23
10810
Its a Murder!
55
2387
16
17
27039
Assembly line
17
518
17
14
11814
Eko
171
15851
13
13
5161
Factorial vs Power
14
1128
13
15
5970
Finding Primes
22
1335
16
15
18530
Font Size
7
201
15
5
5978
Frequent Prime Ranges
10
708
14
14
18185
Give Away
33
1158
20
19
2738
Number Guessing Game
42
4630
8
13
9734
Hacking the random number generator
61
5835
8
6
4200
Hamster flight
13
1150
5
13
37921
Birthday Present
3
38
42
34
36951
HowManyLis
7
144
21
22
8002
Horrible Queries
397
10945
19
18
37465
Do you know Factorials
1
8
18247
Arrangement Validity
11
216
17
21
4415
Power of Integer
1
272
17
26
8985
Line up
19
401
16
17
1431
Projections Of A Polygon
2
118
12
6
36667
Solution to all the problems
13
145
15
11
20063
Large subsequence Problem
20
445
10
14
34356
Ludic Numbers (medium)
5
59
36
39
3975
Most Servings Meal
8
350
28
28
148
Land for Motorways
3
208
17
17
34479
Möbius function zero distribution
4
14
6
17
4061
Polygon
4
212
21
17
4483
Roads Repair
7
180
20
23
27321
Increasing numbers
17
555
13
19
2905
Not a Triangle
93
5022
11
11
25024
Nth Prime
7
103
34
39
12151
Pizzamania
28
2158
5
4
#binary-search
Binary search algorithm finds the position of a target value within a sorted array