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  1. #include <stdlib.h>
  2.  
  3. #include <stdio.h>
  4.  
  5. long long int goo(int,int);
  6.  
  7. int main(){
  8.  
  9.     int n;
  10.  
  11.     scanf("%d",&n);
  12.  
  13.     int **urain=(int**)malloc(sizeof(int*)*n);
  14.  
  15.     for(int i=0;i<n;i++){
  16.  
  17.         *(urain+i)=(int*)malloc(sizeof(int)*2);
  18.  
  19.     }
  20.  
  21.     for(int i=0;i<n;i++){
  22.  
  23.         scanf("%d %d",&urain[i][0],&urain[i][1]);
  24.  
  25.     }
  26.  
  27.     int a,b;
  28.  
  29.     for(int i=0;i<n;i++){
  30.  
  31.         a=urain[i][0];
  32.  
  33.         b=urain[i][1];
  34.  
  35.         printf("%lld %lld\n",goo(a,b),goo(a,b)-goo(a-b+1,b));
  36.  
  37.     }
  38.  
  39.     return 0;
  40.  
  41. }
  42.  
  43. long long int goo(int m,int n){
  44.  
  45.     if(n>(m/2)){
  46.  
  47.         n=m-n;
  48.  
  49.     }
  50.  
  51.     long long int result=1;
  52.  
  53.     for(int i=1;i<=n;i++){
  54.  
  55.         result=result*(m-i+1)/i;
  56.  
  57.     }
  58.  
  59.     return result;
  60.  
  61. }
  62.  
  63.  
Success #stdin #stdout 0s 5288KB
comments (?)
stdin
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10
1 1
2 1
2 2
3 1
3 2
3 3
4 1
4 2
4 3
4 4
stdout
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1 0
2 0
1 0
3 0
3 2
1 0
4 0
6 3
4 3
1 0
https://ideone.com/bDdMMy
language:
C (gcc 8.3)
created:
2 hours ago
visibility:
public

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