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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
216
7735
14
16
7386
Activities
61
1411
16
19
28404
Ada and Field
33
546
21
17
297
Aggressive cows
1050
38515
16
23
15454
How to Handle the Fans
38
1498
11
11
4560
The Double HeLiX
144
8702
12
10
28407
Busqueda Binaria
444
1
1
28467
Búsqueda Binaria 2
1
322
27380
Painting Hat
6
252
11
12
19301
Operators (new ver)
2
38
45
17
43
Copying Books
43
2692
20
19
36671
Bipartite Permutation (Hard)
5
51
29
31
14742
Building Bridges(HARD)
10
444
14
17
6168
Building Bridges
27
1624
11
17
110
Fill the Cisterns
28
1394
21
20
5296
Air Combat
-1
64
34
35669
Consecutive Letters
8
417
16
19
13780
Audition
17
639
17
17
6956
IOI2009 Mecho
3
158
28
23
10810
Its a Murder!
53
2338
15
16
34389
Duck Game
1
27039
Assembly line
17
493
17
14
11814
Eko
171
13833
13
14
5161
Factorial vs Power
14
1095
13
15
5970
Finding Primes
22
1318
15
14
18530
Font Size
7
198
15
5
5978
Frequent Prime Ranges
9
666
13
13
18185
Give Away
31
942
20
18
2738
Number Guessing Game
42
4624
8
13
9734
Hacking the random number generator
61
5681
8
6
4200
Hamster flight
13
1146
5
13
37921
Birthday Present
2
37
34
26
36951
HowManyLis
6
101
19
21
8002
Horrible Queries
393
10575
19
18
37465
Do you know Factorials
1
9
18247
Arrangement Validity
11
209
17
21
4415
Power of Integer
1
267
17
26
8985
Line up
19
384
16
17
1431
Projections Of A Polygon
2
115
9
1
36667
Solution to all the problems
11
141
16
11
20063
Large subsequence Problem
18
439
9
14
34356
Ludic Numbers (medium)
4
58
34
37
3975
Most Servings Meal
8
347
28
28
148
Land for Motorways
3
206
17
17
34479
Möbius function zero distribution
4
15
6
17
4061
Polygon
4
211
21
17
4483
Roads Repair
7
177
20
23
27321
Increasing numbers
17
543
13
19
2905
Not a Triangle
92
4948
11
11
25024
Nth Prime
5
81
30
37
#binary-search
Binary search algorithm finds the position of a target value within a sorted array