/in/foo.cc: In function 'long long int get_max(std::vector<std::vector<int> >&, int)':
/in/foo.cc:26:79: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type {aka long long int}[int]' for array subscript
   26 |                         long long left = (pow(len+1) * nums[idx][i]) + dp[i+1][j];
      |                                                                               ^
/in/foo.cc:27:78: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type {aka long long int}[int]' for array subscript
   27 |                         long long right = (pow(len+1) * nums[idx][j]) + dp[i][j-1];
      |                                                                              ^
/in/foo.cc:28:30: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type {aka long long int}[int]' for array subscript
   28 |                         dp[i][j] = max(left, right);
      |                              ^
/in/foo.cc:25:35: warning: unused variable 'max_num' [-Wunused-variable]
   25 |                         long long max_num = 0;
      |                                   ^~~~~~~
/in/foo.cc:31:21: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type {aka long long int}[int]' for array subscript
   31 |         return dp[0][m-1];
      |                     ^