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  1. #include<stdio.h>
  2. #include <string.h>
  3.  
  4. int main()
  5. {
  6.     unsigned long long n,k,val,fact=1,coeff=0;
  7.  
  8.     char excl[128];
  9.  
  10.     scanf ("%llu %s", &n, excl) ;
  11.  
  12.     k=strlen(excl) ; 
  13.  
  14.     while(n-coeff*k>k)
  15.     {
  16.         val=n-coeff*k;
  17.         fact=fact*val;
  18.         ++coeff;
  19.     }
  20.  
  21.  
  22.     if(n%k)
  23.         fact=fact*(n%k);
  24.     else fact=fact*k;
  25.  
  26.     printf("%llu",fact);
  27.  
  28.     return 0;
  29. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/1tNjl7
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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