Compilare: main.cpp: In function 'bool bfs()': main.cpp:25:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[nod].size(); i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:68:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j< g[n].size(); j++){ ~^~~~~~~~~~~~~ main.cpp:86:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j<g[i].size(); j++) ~^~~~~~~~~~~~ main.cpp:41:18: warning: unused variable 'cmax' [-Wunused-variable] int i, a, b, cmax, e; ^~~~