Compilare: main.cpp: In function 'void sterge_muchie(int, int)': main.cpp:15:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[a].size();i++) ~^~~~~~~~~~~~ main.cpp:18:14: 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:25:14: warning: unused variable 'i' [-Wunused-variable] int u,vf,i; ^ main.cpp:26:10: warning: variable 'ok' set but not used [-Wunused-but-set-variable] bool ok; ^~ main.cpp: In function 'int main()': main.cpp:62:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(sol.size()!=m+1) ~~~~~~~~~~^~~~~ main.cpp:65:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size()-1;i++) ~^~~~~~~~~~~~~