#include<iostream> #include<cstdio> using namespace std; int main() { int a,b,c,d,e; cin>>a; b=a/1000; e=a%10; d=a%100-e; c=a%1000-e-d; b=b/10; c=c/10; d=d/10; e=e*1000; a=b+c+d+e; cout<<a; return 0; }