Compilare: main.cpp: In function 'std::__cxx11::string solve(int, int)': main.cpp:55:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz1==s1.size()&&poz2==s2.size()) ~~~~^~~~~~~~~~~ main.cpp:55:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz1==s1.size()&&poz2==s2.size()) ~~~~^~~~~~~~~~~ main.cpp:57:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz1==s1.size()) ~~~~^~~~~~~~~~~ main.cpp:64:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz2==s2.size()) ~~~~^~~~~~~~~~~ main.cpp:72:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<rez.size();i++) ~^~~~~~~~~~~ main.cpp:75:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=poz2;i<s2.size();i++) ~^~~~~~~~~~