Anyone has suggestions on a clean way of doing this?
How can I get rid of the for-loop?
Replace the for-loop simply by: y = yy - '0' , or by: y = yy - 48 .
Find state names that start with the letter N
Generate pi using logarithm
Is it an Armstrong number?
Vectors counting by 2
All your base are belong to us
Figurate number triangle
Flip the bit
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