JAVA
java
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/*
Validating user input (matrix) for Gaurav Agrawal.
There's code, too... Scroll down ;)
Input test cases:
4 3
3 4 5
1 2 3
6 7 8
0 0 0
3 4
3 4 5 5
1 2 3 8
6 7 8 4
fail 4
3 4 5 5
1 2 3 8
6 7 8 4
0 4
3 4
3 4 5 5
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OUTPUT
Run