Compilare: main.cpp: In function 'void sterge_muchie(int, int)': main.cpp:24:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[a].size();i++) ~^~~~~~~~~~~~ main.cpp:27:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[b].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'void euler(int)': main.cpp:34:14: warning: unused variable 'i' [-Wunused-variable] int u,vf,i; ^ main.cpp:35:10: warning: variable 'ok' set but not used [-Wunused-but-set-variable] bool ok; ^~ main.cpp: In function 'int main()': main.cpp:81:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size()-1;i++) ~^~~~~~~~~~~~~