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  1. #include <stdio.h>
  2.  
  3. int fact(int n){ return (n<=1)?1:n*fact(n-1); }
  4. int factNR(int n){ int f=1; for(int i=1;i<=n;i++) f*=i; return f; }
  5.  
  6. int main(){
  7.     int n,r; scanf("%d%d",&n,&r);
  8.     printf("Rec=%d NonRec=%d nCr=%d",fact(n),factNR(n),fact(n)/(fact(r)*fact(n-r)));
  9. }
  10.  
Success #stdin #stdout 0s 5284KB
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stdout
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Rec=120 NonRec=120 nCr=10
https://ideone.com/FoF2u1
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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