foo.cc: In function 'int main()':
foo.cc:14:63: warning: format '%u' expects argument of type 'unsigned int*', but argument 2 has type '__gnu_cxx::__alloc_traits<std::allocator<long long unsigned int> >::value_type* {aka long long unsigned int*}' [-Wformat=]
   for (long long j = 0; j < m; j++)scanf("%ull", &matrix[i][j]);
                                                               ^
foo.cc:32:20: warning: format '%u' expects argument of type 'unsigned int', but argument 2 has type 'long long unsigned int' [-Wformat=]
  printf("%ull", res);
                    ^
foo.cc:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~~~~
foo.cc:14:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for (long long j = 0; j < m; j++)scanf("%ull", &matrix[i][j]);
                                    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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