Compilare: user.cpp: In function ‘int main()’: user.cpp:17:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void solv()’: user.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<y.size();i++) ^ user.cpp:35:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz==x.size()-1) ^ user.cpp: In function ‘void f()’: user.cpp:44:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2;i<x.size();i++) ^