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Marge Sort

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Dec 3rd, 2016
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  1. #include<stdio.h>
  2. #define MAX 50
  3.  
  4. void mergeSort(int arr[],int low,int mid,int high);
  5. void partition(int arr[],int low,int high);
  6.  
  7. int main(){
  8.  
  9. int merge[MAX],i,n;
  10.  
  11. printf("Enter the total number of elements: ");
  12. scanf("%d",&n);
  13.  
  14. printf("Enter the elements which to be sort: ");
  15. for(i=0;i<n;i++){
  16. scanf("%d",&merge[i]);
  17. }
  18.  
  19. partition(merge,0,n-1);
  20.  
  21. printf("After merge sorting elements are: ");
  22. for(i=0;i<n;i++){
  23. printf("%d ",merge[i]);
  24. }
  25.  
  26. return 0;
  27. }
  28.  
  29. void partition(int arr[],int low,int high){
  30.  
  31. int mid;
  32.  
  33. if(low<high){
  34. mid=(low+high)/2;
  35. partition(arr,low,mid);
  36. partition(arr,mid+1,high);
  37. mergeSort(arr,low,mid,high);
  38. }
  39. }
  40.  
  41. void mergeSort(int arr[],int low,int mid,int high){
  42.  
  43. int i,m,k,l,temp[MAX];
  44.  
  45. l=low;
  46. i=low;
  47. m=mid+1;
  48.  
  49. while((l<=mid)&&(m<=high)){
  50.  
  51. if(arr[l]<=arr[m]){
  52. temp[i]=arr[l];
  53. l++;
  54. }
  55. else{
  56. temp[i]=arr[m];
  57. m++;
  58. }
  59. i++;
  60. }
  61.  
  62. if(l>mid){
  63. for(k=m;k<=high;k++){
  64. temp[i]=arr[k];
  65. i++;
  66. }
  67. }
  68. else{
  69. for(k=l;k<=mid;k++){
  70. temp[i]=arr[k];
  71. i++;
  72. }
  73. }
  74.  
  75. for(k=low;k<=high;k++){
  76. arr[k]=temp[k];
  77. }
  78. }
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