Cod sursa(job #2766564)

Utilizator KlinashkaDiacicov Calin Marian Klinashka Data 2 august 2021 12:45:21
Problema Sortare prin comparare Scor 60
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.79 kb
#include <cstdio>
#include <algorithm>
#include <random>
#include <chrono>
using namespace std;

//random number generator
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, a[500001];

void quicksort(int l, int r) {
    if(l<r) {
        int x = uniform_int_distribution<int>(l, r)(rng);
		swap(a[r], a[x]);
		int i = l-1;
		for(int j=l;j<r;j++) 
		if(a[j] <= a[r]) 
			swap(a[++i], a[j]);
		swap(a[++i], a[r]);
		int q = i;
        quicksort(l, q-1);
        quicksort(q+1, r);
    }
}

int main()
{
    freopen("algsort.in", "r", stdin);
    freopen("algsort.out", "w", stdout);
    scanf("%d", &n);
    for(int i=0;i<n;i++)
        scanf("%d", &a[i]);   
    quicksort(0, n-1);
    for(int i=0;i<n;i++)
        printf("%d ", a[i]);
}