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Jun 23rd, 2017
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  1. #include <stdio.h>
  2.  
  3. long int fat(long int n);
  4. long int c (long int n, long int p);
  5. int main (void);
  6.  
  7. long int fat (long int n)
  8. {
  9. if (n == 1) return 1;
  10. if (n == 0) return 0;
  11.  
  12. return n*fat(n-1);
  13. }
  14. long int c (long int n, long int p)
  15. {
  16. long int comb;
  17. comb = fat(n)/(fat(n-p)*fat(p));
  18. return comb;
  19. }
  20. int main (void)
  21. {
  22. long int n, p;
  23. while (1)
  24. {
  25. scanf ("%ld %ld", &n, &p);
  26. if (n < p) break;
  27. printf ("O valor da combinacao de %ld %ld a %ld vale %ld\n", n, p, p, c(n,p));
  28. }
  29.  
  30. return 0;
  31. }
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