Compilare: main.cpp: In function 'int dist(std::__cxx11::string, std::__cxx11::string)': main.cpp:14:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<min(a.size(),b.size());j++) ~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:20:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=a.size();j<b.size();j++) ~^~~~~~~~~ main.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=b.size();j<a.size();j++) ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:69:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0;k<v[j].size();k++) ~^~~~~~~~~~~~