Compilare: main.cpp: In function 'void Sterge(int)': main.cpp:13:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hash[mod].size();i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int Vf(int)': main.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hash[mod].size();i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:36:14: warning: unused variable 'i' [-Wunused-variable] { int op,x,i; ^