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Java tutorials
Day 11 code of HackerRank solution in java. here is the complete solution using java 8
Using this video you can learn how to use 2d array in java. matrix java.
Here is the blog link from there you can get solution of live competitions from different competitive programming sites
https://trickyprog.blogspot.in/
If you will get any problems in programming you can comment here and I will try to solve your problem as soon as possible.
you can also share your questions on the FB page given above