Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:22:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<g[nod].size(); i++) ^ user.cpp: In function ‘void get_dist(int, int)’: user.cpp:39:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i<g[nod].size(); i++) ^ user.cpp: In function ‘int convert(std::string)’: user.cpp:50:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<s.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:70:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<g[1].size();i++) ^