Compilare: user.cpp: In function ‘int UnionSet(int, int)’: user.cpp:43:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:101:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<muchii.size();i++) ^ user.cpp:125:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<smuchii.size();i++) ^ user.cpp:164:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<fmuchii.size();i++) ^