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Problems

Bitmasks
Difficulty
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5085
XOR 1
5314
2^k + 2^n
5315
Set a bit
5316
Invert a bit
5317
Bit value
5318
Reset the significant bits
5319
Reset a bit
5320
Complementary code - 1
Very easy
5321
Complementary code - 2
Very easy
5474
Mumatrix
Medium
5718
Big difference
Medium
5868
A xor B
6178
Influence
Easy
6311
Keyboard
Very easy
6402
Social Advertising
6454
Intervals
Easy
6777
Bus
Easy
7247
Queries on anti-xor
Very easy
7381
Your Game
Easy
7485
XOR
Medium
7509
Ones and sevens
Easy
7518
I
Medium
7794
"Exclusive Or" Strikes Back
Very easy
7800
Number of Compatible Numbers
Hard
7806
Billiard Balls
Very hard
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