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1. Private-cpp Private-cpp

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   c++ imp notes

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   source to improve knowledge : tips for c++ competitive coding

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   1) swap in single line using bitwise xor operator  ->  (x ^= y), (y ^= x), (x ^= y);

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   2) binary_search( arr, arr+n,key ) of algorithm return true or false and 

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   int key1 = 10;

2. Coding-skills Coding-skills

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   B-brute force

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   U-unnecessary work

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   D-Duplicated work

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   think -> optimize -> test -> implement -> debug -> done

3. Private-Python Private-Python

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   Source to improve knowledge : tech with tim and tips for python

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   1) In Python, value of an integer is not restricted by the number of bits and can expand to the limit of the available memory (Sources : this and this). Thus we never need any special arrangement for storing large numbers (Imagine doing above arithmetic in C/C++).

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   2) type(x) : returns datatype of variable

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   3) id(x) : returns address of variable

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   4) by default takes input as string , need to change type