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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void Merging(int L, int Mid, int H, int ara[])
  5. {
  6.     int m = Mid-L+1;
  7.     int n = H-Mid;
  8.     int A[m], B[n];
  9.  
  10.     for(int i = 0; i < m; i++)
  11.     {
  12.         A[i] = ara[L+i];
  13.     }
  14.     for(int j = 0; j < n; j++)
  15.     {
  16.         B[j] = ara[Mid+1+j];
  17.     }
  18.  
  19.     int i = 0, j = 0, k = L;
  20.     while( i < m && j < n)
  21.     {
  22.         if(A[i] < B[j])
  23.         {
  24.             ara[k] = A[i];
  25.             i++;
  26.             k++;
  27.         }
  28.         else
  29.         {
  30.             ara[k] = B[j];
  31.             k++;
  32.             j++;
  33.         }
  34.     }
  35.  
  36.     for( ; i < m; i++)
  37.     {
  38.         ara[k] = A[i];
  39.         k++;
  40.     }
  41.     for( ; j < n; j++)
  42.     {
  43.         ara[k] = B[j];
  44.         k++;
  45.     }
  46. }
  47.  
  48. void MergeSort(int L, int H, int ara[])
  49. {
  50.     if(L < H)
  51.     {
  52.         int Mid = (L+H)/2;
  53.         MergeSort(L, Mid, ara);
  54.         MergeSort(Mid+1, H, ara);
  55.         Merging(L, Mid, H, ara);
  56.     }
  57. }
  58.  
  59. int main()
  60. {
  61.     int n;
  62.     cin>>n;
  63.     int ara[n];
  64.     for(int i = 0; i < n; i++)
  65.     {
  66.         cin>>ara[i];
  67.     }
  68.  
  69.     MergeSort(0, n-1, ara);
  70.  
  71.     for(int i = 0; i < n; i++)
  72.     {
  73.         cout<<ara[i]<<" ";
  74.     }
  75. }
  76.  
Success #stdin #stdout 0.01s 5312KB
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8                                                                                9 3 7 5 6 4 2 8
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https://ideone.com/pJVGBp
language:
C++ (gcc 8.3)
created:
12 days ago
visibility:
public

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