Compilare: main.cpp: In function 'bool bfs()': main.cpp:23:27: 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:66:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j< g[n].size(); j++){ ~^~~~~~~~~~~~~ main.cpp:84:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j<g[i].size(); j++) ~^~~~~~~~~~~~ main.cpp:39:18: warning: unused variable 'cmax' [-Wunused-variable] int i, a, b, cmax, e; ^~~~