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Cod sursa(job #829191)
#include <iostream>
#include <algorithm>
#include <cstdio>
using namespace std;
#define N_MAX 500010
int v[N_MAX];
int n;
int partition(int v[], int p, int q) {
int piv = rand()%(q-p+1) + p;
swap(v[p], v[piv]);
int i = p;
for(int j = p+1; j <= q; j++) {
if(v[j] <= v[p]) {
i++;
swap(v[i], v[j]);
}
}
swap(v[i], v[p]);
return i;
}
void qsort(int v[], int p, int q) {
if(p >= q) {
return ;
}
int r = partition(v,p,q);
qsort(v,p,r-1);
qsort(v,r+1,q);
}
int main() {
srand(time(NULL));
freopen("algsort.in", "r", stdin);
freopen("algsort.out", "w", stdout);
scanf("%d", &n);
for(int i = 0; i < n; i++) {
scanf("%d", &v[i]);
}
qsort(v, 0, n-1);
for(int i = 0; i < n; i++) {
printf("%d ", v[i]);
}
return 0;
}