Compilare: main.cpp: In function 'int main()': main.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(i=0;i<sol.size()-1;i++) | ~^~~~~~~~~~~~~ main.cpp: In function 'void bkt(int)': main.cpp:98:14: 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:66:9: warning: 'start' may be used uninitialized [-Wmaybe-uninitialized] 66 | {int i, start; | ^~~~~