Compilare: main.cpp: In function 'int main()': main.cpp:62:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int i=0;i<ans.size();i++) | ~^~~~~~~~~~~ main.cpp:60:12: warning: 'A' may be used uninitialized [-Wmaybe-uninitialized] 60 | sum-=A; | ~~~^~~ main.cpp:35:42: note: 'A' was declared here 35 | long long int sum=0,used=0,poz,aux=0,A; | ^