Compilare: main.cpp: In function 'int solve1()': main.cpp:62:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:90:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<s.size(); j++) ~^~~~~~~~~