171214_1110_더하기 사이클

//https://www.acmicpc.net/problem/1110 #include <iostream>

using namespace std;

int main()

{

int origin, x, n;

cin >> origin;

x=origin;

for(n=1; ;n++)

{

int a=x%10;

x = x/10 + x%10;

x = a*10+x%10;

if(x==origin) break;

}

cout << n;

}