/in/foo.cc: In member function 'void Mat::print()':
/in/foo.cc:33:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    for(int j=1;j<=n;j++) printf("%lld ",m[i][j]);printf("\n");
    ^~~
/in/foo.cc:33:50: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
    for(int j=1;j<=n;j++) printf("%lld ",m[i][j]);printf("\n");
                                                  ^~~~~~