\(A\)
咕咕咕
const int N=1e6+5;
char s[N],t[N];int n,res;
inline bool cmp(const int &x,const int &y){return x>y;}
int main(){
scanf("%s",s+1),n=strlen(s+1);
fp(i,1,n)t[i]=s[i];sort(t+1,t+1+n,cmp);
fp(i,1,n)res=(res*10+t[i]-s[i]),res=(res%10+10)%10;
printf("%d\n",res);
return 0;
}const int N=1e6+5;
char s[N],t[N]
