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  1. #include <iostream>
  2. using namespace std;
  3. void merge(int *a,int l ,int mid,int r){
  4. 	int n1=mid-l+1;
  5. 	int n2=r-mid;
  6. 	int A[n1],B[n2];
  7. 	int i=0,j=0,k=l;
  8. 	for(int i=0;i<n1;i++){
  9. 		A[i]=a[l+i];
  10. 	}
  11. 	for(int i=0;i<n2;i++){
  12. 		B[i]=a[mid+1+i];
  13. 	}
  14. 	while(i<n1 && j<n2){
  15. 		if(A[i]<B[j]){
  16. 		   a[k]=A[i];
  17. 		   i++;
  18. 		}
  19. 		else{
  20. 			a[k]=B[j];
  21. 			j++;
  22. 		}
  23. 		k++;
  24. 	}
  25. 	while(i<n1){
  26. 		a[k]=A[i];
  27. 		   k++;
  28. 		   i++;
  29. 	}
  30. 	while(j<n2){
  31. 		a[k]=B[j];
  32. 		   k++;
  33. 		   j++;
  34. 	}
  35.  
  36.  
  37. }
  38. void mergesort(int *a,int l,int r){
  39. 	if(l<r){
  40. 		int mid=(l+r)/2;
  41. 		mergesort(a,l,mid);
  42. 		mergesort(a,mid+1,r);
  43. 		merge(a,l,mid,r);
  44. 	}
  45. }
  46. int main() {
  47. 	int n;
  48. 	cin>>n;
  49. 	int a[n];
  50. 	for(int i=0;i<n;i++){
  51. 		cin>>a[i];
  52. 	}
  53. 	mergesort(a,0,n-1);
  54. 	for(int i=0;i<n;i++){
  55. 		cout<<a[i]<<" ";
  56. 	}
  57. 	return 0;
  58. }
Success #stdin #stdout 0.01s 5524KB
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stdin
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8
1 3 4 2 6 10 54 43
stdout
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1 2 3 4 6 10 43 54
https://ideone.com/XbGwPn
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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