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  1. void qsort1(int *a, int n){
  2.     if(n>1){
  3.         int l=0, r=n-1, m=n/2;
  4.         while(l<=r){
  5.             while(a[l]<a[m])l++;
  6.             while(a[r]>a[m])r--;
  7.             if(l<=r){
  8.                 int t=a[l];
  9.                 a[l]=a[r];
  10.                 a[r]=t;
  11.                 l++; r--;
  12.             }
  13.         }
  14.         qsort(a, r+1);
  15.         qsort(a+l, n-l);
  16.         }
  17. }
  18.  
  19. void qsort2(int *a, int n){
  20.     if(n>1){
  21.         int l=0, r=n-1, m=n/2;
  22.         while(l<=m && m<r){
  23.             while(a[l]<=m)l++;
  24.             while(a[r]>=m)r--;
  25.             int t=a[l]; a[l]=a[r]; a[r]=t; l++; r--;
  26.         }
  27.         qsort(a, m);
  28.         qsort(a+m, m);
  29.     }
  30. }
  31.  
  32. int main() {
  33.     int i, a[]={-1,1,-1,1,-1,1,-1,1,-1,1,-1};
  34.     for(i=0;i<sizeof(a)/sizeof(int);i++)printf("%d ", a[i]);
  35.     qsort1(a, sizeof(a)/sizeof(int));
  36.     printf("\n");
  37.     for(i=0;i<sizeof(a)/sizeof(int);i++)printf("%d ", a[i]);
  38. }
Runtime error #stdin #stdout 0s 4512KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/BgD7mK
language:
C (gcc 8.3)
created:
4 years ago
visibility:
secret

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