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  1. #include <stdio.h>
  2.  
  3. int main()
  4. {
  5.     int n;
  6.     int t = 1;
  7.     int c;
  8.  
  9.     while(~scanf("%d", &n))
  10.     {
  11.     t=1;
  12.     for(int i = 2; t%n!=0; i++)
  13.     {
  14.         t = t*10 + 1;
  15.         t %= n;
  16.         c = i;
  17.         if(t<0){printf("?"); break;}
  18.     }
  19.  
  20.     printf("%d\n", c);
  21.     }
  22. }
Success #stdin #stdout 0.01s 5308KB
comments (?)
stdin
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3
7
9901
stdout
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3
6
12
https://ideone.com/ZQ02N5
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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