Compilare: main.cpp: In function 'std::__cxx11::string solve(char, char)': main.cpp:22:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (ans.size () > t) ~~~~~~~~~~~~^~~ main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= sl.size (); i++) { ~~^~~~~~~~~~~~~ main.cpp:37:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int w = j + i; w < ans.size (); w++) ~~^~~~~~~~~~~~~ main.cpp:40:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (t == maybe.size ()) { ~~^~~~~~~~~~~~~~~~ main.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == sr.size ()) ~~^~~~~~~~~~~~~ main.cpp:49:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == sr.size ()) ~~^~~~~~~~~~~~~