Compilare: main.cpp: In function 'int main()': main.cpp:60:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<aux.size();j++) ~^~~~~~~~~~~ main.cpp:37:13: warning: unused variable 'j' [-Wunused-variable] {int j=i;aux.clear(); ^ main.cpp:70:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ~^~~~~~~~~~~ main.cpp:73:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sol[i].size();j++) ~^~~~~~~~~~~~~~