Compilare: main.cpp: In function 'int main()': main.cpp:78:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ans.size() != m + 1) ~~~~~~~~~~~^~~~~~~~ main.cpp:86:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < ans.size(); i++) ~~^~~~~~~~~~~~ main.cpp:45:9: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized] int start; ^~~~~