Cod sursa(job #767888)

Utilizator mathboyDragos-Alin Rotaru mathboy Data 15 iulie 2012 12:14:32
Problema Sortare prin comparare Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 0.96 kb
#include <cstdio>
#include <cstring>
#include <string>
#include <ctime>
#include <cstdlib>
#include <fstream>

#define f sorting_like_a_boss

const int maxn = 500010;
using namespace std;


inline int segment(int A[], int left, int right, int piv) {

	swap(A[piv], A[right]);
	
	int go = left;

	for(int i = left; i < right; ++i)
		if(A[i] < A[right]) {
			swap(A[i], A[go]); 
			go += 1;
		}
	swap(A[go], A[right]);

	return go;
}
void sorting_like_a_boss(int A[], int left, int right) {
	
	if(left >= right) return ;

	int pivOld = left + rand() % (right - left + 1);
	
	int pivNew = segment(A, left, right, pivOld);

	sorting_like_a_boss(A, left, pivNew - 1);
	sorting_like_a_boss(A, pivNew + 1, right);
}
int A[maxn], N;

int main() {
	freopen("algsort.out", "w", stdout);
	ifstream fin("algsort.in");

	fin >> N;	
	srand(time(NULL));

	for(int i = 1; i <= N; ++i)
		fin >> A[i];

	sorting_like_a_boss(A, 1, N);
	
	for(int i = 1; i <= N; ++i)
		printf("%d ", A[i]);

	return 0;
}