Cod sursa(job #505594)

Utilizator c_sebiSebastian Crisan c_sebi Data 2 decembrie 2010 23:25:08
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.93 kb
#include <fstream>

using namespace std;

int a[500001];

void insertion(int l, int r){
    int i, j, v;
    for(i = l + 1; i <= r; i++){
        v = a[i];
        j = i - 1;
        while(j >= l && a[j] > v) {a[j+1] = a[j]; j--;}
        a[j+1] = v;
    }

}

int Partition(int l, int r)
{

    	int x = a[(l+r)>>1], aux;
	int i = l, j = r;
	while(i <= j){
        while(a[i] < x) i++;
        while(a[j] > x) j--;
        if(i <= j) { aux = a[i]; a[i] = a[j]; a[j] = aux; i++; j--; }
	}

	return j;
}


void quick(int l, int r){

    if(r - l > 0){

        int q = Partition(l, r);
        quick(l, q);
        quick(q+1, r);
    }
    //else insertion(l, r);
}

int main(){
    ifstream f("algsort.in");
    ofstream g("algsort.out");
    int i = 0, n;
    f>>n;
    for(i = 0; i < n; i++)
        f>>a[i];
    quick(0, n-1);
    for(i = 0; i < n; i++)
        g<<a[i]<<" ";
    return 0;
}