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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
30757
Ada and Carrot
6
134
17
34
32029
Ada and Connections
7
71
26
28
32840
Ada and Digits
15
174
20
18
32949
Ada and Digits 2
5
74
30
30
30739
Ada and Manure
18
311
11
22
30755
Ada and GCD
20
444
28
15
30691
Ada and Diary
3
59
9
9
30737
Ada and Homework
5
68
34
28
32683
Ada and Kohlrabi
5
70
30
13
32059
Ada and Taxes
16
106
23
23
5151
Alice’s Cube
8
509
24
21
10232
Distinct Primes
85
5897
10
9
4556
Think I will Buy Me a Football Team
30
2184
7
11
5451
Not So Flat After All
9
1124
11
10
13753
Amazing Prime Sequence
61
3350
11
12
30826
Bernoulli numbers
4
7
23
12
31066
Number Breaking
10
845
13
12
21357
Crucial Equation
80
6327
4
9
3505
Prime Number Theorem
25
1534
14
13
9032
Cube Free Numbers
65
4157
12
11
526
Divisors
38
1704
14
13
530
Divisors 2
10
931
12
16
22403
Divisors of factorial
71
1967
14
14
74
Divisor Summation
95
16514
7
10
23963
Easy Factorials
10
113
27
26
4141
Euler Totient Function
147
11860
8
11
22382
Euler Totient Function Depth
24
390
15
16
4942
Integer Factorization (15 digits)
45
3569
11
11
33046
Factorial Modulo Prime
4
30
46
42
25584
Factorial Modulo
25
413
10
15
42523
Finding ABC
0
25067
Fibonacci Polynomial
8
237
11
19
5970
Finding Primes
22
1340
16
15
6264
Rank of a Fraction
4
131
12
34
5978
Frequent Prime Ranges
10
710
14
14
3871
GCD Extreme
81
2931
19
26
41657
GCD Goodness
2
24
17
26
26045
GCD OF MATRIX (hard)
4
133
42
29
41507
GCD Product Sum
6
47
6
23
12005
Grass Planting
11
572
29
19
18202
HUGE GCD
17
684
14
13
4164
A conjecture of Paul Erdős
24
2516
16
15
12241
Classification from Erdős and Selfridge
5
29
28
28
27195
Find The Number
7
214
20
17
6221
Increasing Powers of K
4
356
24
34
6256
Inversion Count
533
17711
16
18
40083
Just Primes
11
115
15
17
40084
Just Primes II
7
25
34
30
12183
Help the Commander in Chief
46
914
15
16
34812
Kth Power Summation
6
54
25
19
#number-theory
The problem involves number theory, a branch of pure mathematics