Compilare: user.cpp: In function ‘void dfs(int, int, int)’: user.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ user.cpp: In function ‘void dfs1(int, int)’: user.cpp:62:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ user.cpp: In function ‘void dfs2(int, int, long long int, long long int)’: user.cpp:82:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ user.cpp:90:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:122:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(culori[i].size()<=bs) ~~~~~~~~~~~~~~~~^~~~ user.cpp:125:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<culori[i].size()-1;++j) ~^~~~~~~~~~~~~~~~~~~ user.cpp:126:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=j+1;k<culori[i].size();++k) ~^~~~~~~~~~~~~~~~~