Compilare: user.cpp: In function ‘int main()’: user.cpp:46:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[aux].size(); i++) ^ user.cpp:67:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[aux].size(); i++) ^ user.cpp:89:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<sol.size(); i++) ^ user.cpp:34:9: warning: variable ‘nr’ set but not used [-Wunused-but-set-variable] int nr = 0,i,aux,nrok,nraux; ^