Compilare: main.cpp: In function 'void bfs()': main.cpp:30:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int start=1; start<=v.size();start++){ | ~~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:55:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for(int i=0;i<t.size();i++) | ~^~~~~~~~~