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- #include <iostream>
- using namespace std;
- int main()
- {
- int n;
- cin>>n;
- int rez=0;
- while(n!=0)
- {
- int x=n;
- int cifra=0;
- while(x>0)
- {
- cifra=max(cifra,x%10);
- x/=10;
- }
- n-=cifra;
- rez++;
- }
- cout<<rez;
- return 0;
- }
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