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  1. #include<stdio.h>
  2.  
  3. void Merge_Sort(int a[],int,int);
  4. void Merge(int a[],int,int);
  5. int main()
  6. {
  7.     int a[100],b[100],j,count,i,n,test;
  8.  
  9.     scanf("%d",&test);
  10.  
  11.     while(test>0)
  12.     {
  13.         scanf("%d",&n);
  14.  
  15.         for(i=0;i<n;i++)
  16.             scanf("%d",&a[i]);
  17.         for(i=0;i<n;i++)
  18.             scanf("%d",&b[i]);
  19.  
  20.         Merge_Sort(a,0,n);
  21.         Merge_Sort(b,0,n);
  22.  
  23.         i=n-1;
  24.         j=n-1;
  25.         count=0;
  26.  
  27.         while(i>=0)
  28.         {
  29.             if(a[i]<=b[j])
  30.             {
  31.                 i--;
  32.                 j--;
  33.                 count++;
  34.             }
  35.             else
  36.             {
  37.                 i--;
  38.             }
  39.         }
  40.  
  41.         printf("%d\n",count);
  42.  
  43.         test--;
  44.     }
  45.  
  46.  
  47.  
  48.     //for(i=0;i<10;i++)
  49.       //  printf("\n --->%d",a[i]);
  50.  
  51. }
  52.  
  53. void Merge_Sort(int a[],int p,int r)
  54. {
  55.     int q;
  56.     if(p<r)
  57.     {
  58.         q=(p+r)/2;
  59.  
  60.         Merge_Sort(a,p,q);
  61.         Merge_Sort(a,q+1,r);
  62.         Merge(a,p,r);
  63.     }
  64. }
  65.  
  66. void Merge(int a[],int p,int r)
  67. {
  68.     int k=0,i,j;
  69.     int q=(p+r)/2;
  70.     int A[30],B[30];
  71.     int n1=q-p+1,n2=r-q;
  72.  
  73.     for(i=0;i<n1;i++)
  74.         A[i]=a[p+i];
  75.  
  76.     A[i]=999;
  77.  
  78.     for(i=0;i<n2;i++)
  79.         B[i]=a[q+1+i];
  80.     B[i]=999;
  81.  
  82.     i=0,j=0;
  83.     k=p;
  84.     while(k<=r)
  85.     {
  86.  
  87.         if(A[i]<=B[j])
  88.         {
  89.             a[k]=A[i];
  90.             i++;
  91.             k++;
  92.         }
  93.         else
  94.         {
  95.             a[k]=B[j];
  96.             j++;
  97.             k++;
  98.         }
  99.     }
  100. }
  101.  
  102.  
  103.  
  104.  
  105.  
Success #stdin #stdout 0.02s 2680KB
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https://ideone.com/qNPodR
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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