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  1. #include <stdio.h>
  2.  
  3. int main() {
  4.     int n, a, b, newn, circle = 0;
  5.     scanf("%d", &n);
  6.     a = n / 10; // 10의 자리
  7.     b = n % 10; // 1의 자리
  8.     do {
  9.         newn = (a + b) % 10 + b * 10;
  10.         a = newn / 10; // 다음 값의 10의 자리
  11.         b = newn % 10; // 다음 값의 1의 자리
  12.         circle++;
  13.     } while (newn != n);
  14.     printf("%d", circle);
  15.     return 0;
  16. }
  17.  
Success #stdin #stdout 0.01s 5308KB
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https://ideone.com/d8pcRQ
language:
C (gcc 8.3)
created:
13 days ago
visibility:
public

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