Compilare: main.cpp: In function 'void euler(int)': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Nustiu>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int i = 0 ; i < v[nod].size() ; i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void afisv()': main.cpp:40:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Nustiu>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int j = 0 ; j < v[i].size() ; j++) | ~~^~~~~~~~~~~~~