Compilare: main.cpp: In function 'std::__cxx11::string findsz(char)': main.cpp:20:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(query(s) != s.size()) ~~~~~~~~~^~~~~~~~~~~ main.cpp: In function 'std::__cxx11::string merget(std::__cxx11::string, std::__cxx11::string)': main.cpp:31:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p == a.size()) { ~~^~~~~~~~~~~ main.cpp:34:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] } else if(p2 == b.size()){ ~~~^~~~~~~~~~~ main.cpp:37:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] } else if(query(s + a[p] + b.substr(p2 , b.size() - p2)) == 1 + p + b.size()){ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~