Number of non zero elements 4
==3163== Invalid write of size 4
==3163==    at 0x401499: Matrix::Matrix(char const*) (matrix.cpp:46)
==3163==    by 0x400E8F: main (main.cpp:7)
==3163==  Address 0x5aba878 is 0 bytes after a block of size 8 alloc'd
==3163==    at 0x4C2C820: operator new[](unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==3163==    by 0x40134C: Matrix::Matrix(char const*) (matrix.cpp:36)
==3163==    by 0x400E8F: main (main.cpp:7)
==3163==
==3163== Invalid write of size 8
==3163==    at 0x4014E6: Matrix::Matrix(char const*) (matrix.cpp:47)
==3163==    by 0x400E8F: main (main.cpp:7)
==3163==  Address 0x5aba7e0 is 0 bytes after a block of size 16 alloc'd
==3163==    at 0x4C2C820: operator new[](unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==3163==    by 0x4012D8: Matrix::Matrix(char const*) (matrix.cpp:34)
==3163==    by 0x400E8F: main (main.cpp:7)
==3163==
==3163== Invalid write of size 8
==3163==    at 0x401534: Matrix::Matrix(char const*) (matrix.cpp:48)
==3163==    by 0x400E8F: main (main.cpp:7)
==3163==  Address 0x5aba830 is 0 bytes after a block of size 16 alloc'd
==3163==    at 0x4C2C820: operator new[](unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==3163==    by 0x401312: Matrix::Matrix(char const*) (matrix.cpp:35)
==3163==    by 0x400E8F: main (main.cpp:7)
==3163==

0x5ab7910 0x5ab7970 0x5ab79d0 0x5ab7a80 0x5ab7a30
==3163==
==3163== HEAP SUMMARY:
==3163==     in use at exit: 72,704 bytes in 1 blocks
==3163==   total heap usage: 57 allocs, 56 frees, 92,540 bytes allocated
==3163==
==3163== LEAK SUMMARY:
==3163==    definitely lost: 0 bytes in 0 blocks
==3163==    indirectly lost: 0 bytes in 0 blocks
==3163==      possibly lost: 0 bytes in 0 blocks
==3163==    still reachable: 72,704 bytes in 1 blocks
==3163==         suppressed: 0 bytes in 0 blocks
==3163== Rerun with --leak-check=full to see details of leaked memory
==3163==
==3163== For counts of detected and suppressed errors, rerun with: -v
==3163== ERROR SUMMARY: 6 errors from 3 contexts (suppressed: 0 from 0)