Compilare: main.cpp: In function 'int main()': main.cpp:83:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ans.size() != m + 1) { ~~~~~~~~~~~^~~~~~~~ main.cpp:91:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i++; i < ans.size(); i++) ~~^~~~~~~~~~~~ main.cpp:103:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ans.size() != m ) { ~~~~~~~~~~~^~~~