# for i in $(seq 1 5); do time ./matrix_mult_12.o; done 
        0.41 real         0.17 user         0.20 sys
        0.41 real         0.21 user         0.16 sys
        0.41 real         0.19 user         0.18 sys
        0.41 real         0.17 user         0.20 sys
        0.41 real         0.19 user         0.18 sys