[BAEKJOON] 1110 : 더하기 사이클

#include<stdio.h>
 
int main(){
 
    int i;
    int result;
    int A, B, C, D;
    int count = 0;
 
    scanf("%d", &i);
 
    result = i;
 
    while (1)
    {
        A = i / 10;
        B = i % 10;
        C = (A + B) % 10;
        D = (B * 10) + C;
        i = D;
        count++;
        if (D == result) break;
    }
    printf("%d", count);
}