Compilare: user.cpp: In function ‘int main()’: user.cpp:23:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[y%mod].size();i++) ^ user.cpp:33:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[y%mod].size();i++) ^ user.cpp:40:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[y%mod].size();i++) ^