Compilare: user.cpp: In function ‘int main()’: user.cpp:17:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[1].size();j++){ ^ user.cpp:24:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();j++){ ^ user.cpp:25:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if((stare-(1<<v[i][j]))>0) ^