Compilare: main.cpp: In function 'void add(nod*&, int)': main.cpp:38:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if(poz < s.size()) | ~~~~^~~~~~~~~~ main.cpp: In function 'int op(nod*, int)': main.cpp:95:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 95 | if(poz < s.size()) | ~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:153:31: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses] 153 | if(csor[i] ^ csor[st] > maxi) | ~~~~~~~~~^~~~~~