Compilare: main.cpp: In function 'void afisv()': main.cpp:19:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int j = 0 ; j < v[i].size() ; j++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int bfs()': main.cpp:34:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i = 0 ; i < v[a].size() ; i++) | ~~^~~~~~~~~~~~~ main.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type] 46 | } | ^