include <stdio.h>

int main() { int a,b,c,d,e; b=0; scanf("%d",&a); if(a>=1) {

b=b+(a/100%10);
c=c+(a/10%10);
d=d+(a/1%10);

} if(a==bbb+ccc+ddd){ printf("YES");} else{ printf("NO");} return 0; }