Compilare: main.cpp: In function 'int main()': main.cpp:42:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (llg i=len_t; i<s.size(); ++i) { ~^~~~~~~~~ main.cpp:49:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (llg i=0; i<sol.size() && i<1000; ++i) ~^~~~~~~~~~~