Compilare: main.cpp: In function 'void dfs(int)': main.cpp:279:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ed[pz].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'void remove_edge(int, int)': main.cpp:289:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ed[a].size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:295:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ed[b].size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp: In function 'void dfssize(int, int)': main.cpp:306:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ed[pz].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'int getcentroid(int, int, int)': main.cpp:317:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ed[pz].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:357:17: warning: unused variable 'cnt' [-Wunused-variable] int t,n,i,j,cnt=0; ^~~