Compilare: main.cpp: In function 'int main()': main.cpp:26:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size();i++) ~^~~~~~~~~~~ main.cpp: In function 'void bfs(int)': main.cpp:53:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[nodcrt].size();i++) ~^~~~~~~~~~~~~~~~~ main.cpp:46:18: warning: unused variable 'j' [-Wunused-variable] int nodcrt,i,j; ^