Cod sursa(job #1721996)

Utilizator elena.marinicaMarinica Elena-Georgiana elena.marinica Data 26 iunie 2016 23:24:38
Problema Sortare prin comparare Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 0.73 kb
#include <bits/stdc++.h>

using namespace std;
#define NMAX 500003

int v[NMAX];

void quick_sort(int v[], int lower, int upper) {

	if (lower < upper) {
		
		int mid = lower + (upper - lower) / 2;
		
		int piv = v[mid];
		std::swap(v[mid], v[upper]);
	
		int p = lower;

		for (int i = lower; i < upper; i++) {
		
			if (v[i] <= piv) 
				swap(v[p++], v[i]);
			
		}
	
		swap(v[upper], v[p]);
		
		quick_sort(v, p + 1, upper);
		quick_sort(v, lower, p - 1);
	
	}
}


int main() {
	
	ifstream fin("algsort.in");
	ofstream fout("algsort.out");
	
	int N, x;
	
	fin >> N;
	
	for (int i = 1; i <= N; i++) {
		fin >> x;
		v[i] = x;
	}
	
	quick_sort(v, 1, N );
	
	for (int i = 1; i <= N; i++) {
		fout << v[i] << " ";
	}
	
	fin.close();
	fout.close();
	
	
}