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Cod sursa(job #556910)
#include<fstream>
#define maxn 500010
using namespace std;
int n,left,right;
int arr[maxn];
ifstream f("algsort.in");
ofstream g("algsort.out");
void citire(){
f>>n;
for(int i=1;i<=n;i++)
f>>arr[i];
}
void quickSort(int arr[], int left, int right) {
int i = left, j = right;
int tmp;
int pivot = arr[(left + right) / 2];
/* partition */
while (i <= j) {
while (arr[i] < pivot)
i++;
while (arr[j] > pivot)
j--;
if (i <= j) {
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
i++;
j--;
}
};
/* recursion */
if (left < j)
quickSort(arr, left, j);
if (i < right)
quickSort(arr, i, right);
}
int main(){
citire();
quickSort(arr,1,n);
for(int i=1;i<=n;i++)
g<<arr[i]<<' ';
g<<'\n';
g.close();
return 0;
}