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Math

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Level 8

Be a Code Ninja!

Unary number system

Way back in the day, we didn’t have base systems! It was uphill both ways, through the snow and blazing heat. When you wanted to count one, you’d write:

|

When you wanted 5, you’d write

|||||

And clearly, 1 + 5 = 6

| + ||||| = ||||||

This is the simplest way of counting.

The value of any number = number of |’s

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Math Problems

Base conversion
Problem Score Companies Time Status
Excel Column Number 175 23:19
Excel Column Title 175 41:11
Digit op
Problem Score Companies Time Status
Palindrome Integer 200
HCL
17:28
Reverse integer 200 28:36
Next Smallest Palindrome! 400 58:55
Number encoding
Problem Score Companies Time Status
Next Similar Number 200 54:52
Rearrange Array 250
49:03
Array dp
Problem Score Companies Time Status
Numbers of length N and value less than K 200
89:58
Combinatorics
Problem Score Companies Time Status
City Tour 300
61:23
Grid Unique Paths 375 32:35
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