I solved 372 problems (185- easy, 174 - medium, 13 - hard).
I dont feel confident when i see new problems, i think i am missing something as i am unable to solve many problems. i am practising leetcode questions daily .
I think i am not in correct path while practising leetcode sums.

1. please suggest how to practise in a efficient way
2. how to tackle unknown or hard prblems
3. if i get a solution and if it doesnt solve all test cases then how should i know for what testcases my code is failing without looking at the actual test case