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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <unistd.h>
  4. #include <ctype.h>
  5. #include <string.h> 
  6.  
  7. int main(){
  8. 	int t, s, totol=1, d, ans=1;
  9. 	int a,b;
  10. 	scanf("%d", &t);
  11. 	for(int k=0;k<t;k++){
  12. 		totol=1, ans=1;
  13. 		scanf("%d %d", &a, &b); 
  14. 		if(b>(a-b+1)){
  15. 			ans=0;
  16. 			b=a-b; 
  17. 		} 
  18. 		for(int j=1;j<b+1;j++){
  19. 			ans *= (a-b+2-j);
  20. 		}for(int j=1;j<b+1;j++){
  21. 			ans /= j;
  22. 		}
  23. 		for(int w=1;w<b+1;w++){
  24. 			totol *= (a-w+1);
  25. 		}for(int w=1;w<b+1;w++){
  26. 			totol /= w;
  27. 		}  
  28. 		s=totol;
  29. 		d=totol-ans;
  30. 		if(a==1&&b==1){
  31. 			printf("1 0");
  32. 		}else{ 
  33. 		printf("%d %d\n", s, d);
  34. 		}
  35. 	} 
  36. }
Success #stdin #stdout 0.01s 5284KB
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https://ideone.com/E8C2o2
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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