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:58:5: error: 'sort' was not declared in this scope
sort(path.begin(), path.end(), cmp);
^~~~
meetings.cpp:58:5: note: suggested alternative: 'qsort'
sort(path.begin(), path.end(), cmp);
^~~~
qsort
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++){
~~^~~~~~~~~~~~