백준 1110번 c++ 풀이

코드:

    #include <iostream>
    using namespace:: std;
    int main(){
        int a;
        int count = 0;
        cin>>a;
        if(a==0){
            cout<<1;
        }
        else if(a/10 == 0){
            int first = a;
            a = a* 11;
            count ++;
            while(first!=a){
                count++;
                a = (a%10)*10 + (a%10+a/10)%10;
            }
            cout<<count;
        }
        else{
            int first = a;
            a = (a%10)*10 + (a%10+a/10)%10;
            count ++;
            while(first!=a){
                count++;
                a = (a%10)*10 + (a%10+a/10)%10;
            }
            cout<<count;
            
        }
        return 0;
    }