Compilare: user.cpp: In function ‘int find(int)’: user.cpp:13:9: warning: variable ‘y’ set but not used [-Wunused-but-set-variable] int y = x; ^ user.cpp:17:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int join(int, int)’: user.cpp:24:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:56:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<grupa[i].size(); j++) ^