Compilare: main.cpp: In function 'int main()': main.cpp:59:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(sol[i].size()>solu) ~~~~~~~~~~~~~^~~~~ main.cpp:71:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol[caree].size();++i) ~^~~~~~~~~~~~~~~~~~ main.cpp:80:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol[caree].size();++i) ~^~~~~~~~~~~~~~~~~~