meetings.cpp: In function 'void solve1(int)':
meetings.cpp:15:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i=0;i<lis[root].size();i++){
~^~~~~~~~~~~~~~~~~
meetings.cpp:26:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i=0;i<idx.size();i++){
~^~~~~~~~~~~
meetings.cpp:30:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i=0;i<idx.size();i++){
~^~~~~~~~~~~
meetings.cpp:8:29: warning: unused variable 'k' [-Wunused-variable]
int n=lis[root].size(),i,j,k,l,ran,ver;
^
meetings.cpp:8:31: warning: unused variable 'l' [-Wunused-variable]
int n=lis[root].size(),i,j,k,l,ran,ver;
^