Compilare: main.cpp: In function 'void get_ans(int, long long int)': main.cpp:22:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(where==d.size()) ~~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ans.size();i++) ~^~~~~~~~~~~ main.cpp: In function 'void get_ans(int, long long int)': main.cpp:35:16: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized] c=c/2+x; ~^~