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Problems
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Difficulty
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27
Cycle shifts
Easy
622
Ones
Very easy
1612
Change the one
Very easy
1645
Binary number
Easy
1648
Fenwick Function
Easy
1651
Maximal XOR
Very easy
1753
Lowest Bit
Easy
1851
Duel
Very easy
2054
Happy Painting!
Very hard
2153
Probabilistic OR
Medium
2262
Explicit Formula
Easy
2407
Japanese computer
Easy
2415
Disc number
Very easy
2439
Boolean Extremes
Very hard
2693
Binary vs. Negative Binary
Medium
2733
The sum of powers of two
Very easy
2798
Sequence
Easy
2850
Fate to hate
Very easy
2871
Hypercube High
Very hard
2877
SuperNim High
Very hard
2936
Dima & module
Hard
3084
XOR
Hard
3197
Leaky Cryptography
Hard
3327
Playing With Stones
Very easy
3651
Digit-wise modulo 3
Very easy
1
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5
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