Блог пользователя kuldeepkushwaha

Автор kuldeepkushwaha, история, 23 месяца назад, По-английски

How to solve a difficult problem (which has been stuck for a long time) and understand the same concept for a long time...

I'm aware that there could be problems that frustrate people severely and remain unsolved for a very long period. (Please respond.) how to fight such problems....

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