Compilare: user.cpp: In function ‘void bk(short int)’: user.cpp:71:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p>v1.size()) ^ user.cpp: In function ‘int main()’: user.cpp:108:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(short i=0;i<s1.size();i++) ^ user.cpp:120:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(short i=0;i<s2.size();i++) ^ user.cpp:145:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(short i=1;i<=v1.size();i++) ^