Compilare: main.cpp: In function 'int bfs()': main.cpp:20:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[101].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:70:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size();i++) ~^~~~~~~~~~~