Compilare: user.cpp: In function ‘int main()’: user.cpp:28:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz + 1 < strlen(s) && poz + 1 - l - 2 >= 0 && s[poz + 1] == s[poz + 1 - l - 2]) ^ user.cpp:32:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == strlen(s) - 1) ^