meetings.cpp: In function 'void dfs(std::vector<int>)':
meetings.cpp:47:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0; i < v.size(); i++){
~~^~~~~~~~~~
meetings.cpp:58:40: error: cannot convert 'std::vector<int>::iterator {aka __gnu_cxx::__normal_iterator<int*, std::vector<int> >}' to 'void*' for argument '1' to 'void qsort(void*, size_t, size_t, __compar_fn_t)'
qsort(path.begin(), path.end(), cmp);
^
meetings.cpp:59:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 1; i < path.size(); i++){
~~^~~~~~~~~~~~~
meetings.cpp:62:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0; i < v.size(); i++){
~~^~~~~~~~~~
meetings.cpp: In function 'void Solve(int)':
meetings.cpp:75:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0; i < ans.size(); i++){
~~^~~~~~~~~~~~