Compilare: main.cpp: In function 'int main()': main.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | else for(i=0;i<sol.size()-1;i++) fout<<sol[i]<<' '; | ~^~~~~~~~~~~~~ main.cpp: In function 'void euler(int)': main.cpp:98:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<varf>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 98 | for(i=0; i<G[start].size(); i++) | ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int grade_pare()': main.cpp:62:11: warning: 'start' may be used uninitialized [-Wmaybe-uninitialized] 62 | int i,start; | ^~~~~