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  1. #include <stdio.h>
  2.  
  3. int func(int n, int k){
  4. if(k==0 || k==n)
  5. return 1;
  6. else
  7. return func(n-1, k-1) + func(n-1, k);
  8. }
  9.  
  10. int main(void){
  11.  
  12. printf("%d\n", func(4,2));
  13.  
  14. return 0;
  15. }
  16.  
Success #stdin #stdout 0s 5320KB
stdin
Standard input is empty
stdout
6