/in/foo.cc: In function 'void dfs(std::vector<std::vector<int> >&, int, int, int, int, std::vector<int>&)':
/in/foo.cc:9:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < temp.size(); i++)
                   ~~^~~~~~~~~~~~~
/in/foo.cc:13:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(x+1<graph.size()&& y + 1 < graph[0].size() &&graph[x+1][y]>= graph[x][y+1])
     ~~~^~~~~~~~~~~~~
/in/foo.cc:13:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(x+1<graph.size()&& y + 1 < graph[0].size() &&graph[x+1][y]>= graph[x][y+1])
                        ~~~~~~^~~~~~~~~~~~~~~~~
/in/foo.cc:15:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   else if(y + 1 < graph[0].size())
           ~~~~~~^~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'int minPathSum(std::vector<std::vector<int> >&)':
/in/foo.cc:24:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 1; i < grid.size(); i++)
                  ~~^~~~~~~~~~~~~
/in/foo.cc:26:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int j = 1; j < grid[0].size(); j++)
                  ~~^~~~~~~~~~~~~~~~
/in/foo.cc:28:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 1; i < grid.size(); i++)
                  ~~^~~~~~~~~~~~~
/in/foo.cc:29:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 1; j < grid[0].size(); j++)
                   ~~^~~~~~~~~~~~~~~~