Compilare: main.cpp: In function 'void bellman(int)': main.cpp:38:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if(viz[i.first]==v[p.second].size()) | ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:51:11: warning: unused variable 'j' [-Wunused-variable] 51 | int i,j,x,y,c; | ^