#include <iostream> using namespace std; int main(int argc, char* argv[]) { int A,B; cin>>A>>B; int ans=0; if (A>B){ //must B<C; ans=A-B-1+2000000000-A; }else if (A<B){ //must B>C ans=B-A-1+A-1; } cout<<ans<<endl; return 0; }