Compilare: main.cpp: In function 'int solve(std::__cxx11::string, std::__cxx11::string)': main.cpp:11:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a.size(); i++) ~^~~~~~~~~ main.cpp:12:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<b.size(); j++) ~^~~~~~~~~ main.cpp:17:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return (a.size()+b.size()-2*cmlsc[a.size()-1][b.size()-1])<=k; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~ main.cpp: In function 'int main()': main.cpp:39:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<c.size(); i++) ~^~~~~~~~~ main.cpp:43:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<c.size(); i++) ~^~~~~~~~~