Cod sursa(job #330053)

Utilizator RobybrasovRobert Hangu Robybrasov Data 8 iulie 2009 15:42:43
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.08 kb
//Quicksort cu citire parsata
#include <cstdio>
#include <cstdlib>
#define S_MAX 65536
#define N 500001

int A[N];
int k=0;
char S[S_MAX];

int poz(int a, int b)
{
    int i,j,t,r=(a+b)>>1;
    t=A[a]; A[a]=A[r]; A[r]=t;
    for (i=0, j=-1; a<b; a+=i, b+=j)
        if (A[a]>=A[b])
        {
            t=A[a]; A[a]=A[b]; A[b]=t;
            t=i; i=-j; j=-t;
        }

    return a;
}

void sort(int a, int b)
{
    if (a<b)
    {
        int m=poz(a,b);
        sort(a,m-1);
        sort(m+1,b);
    }
}

void read(int &nr)
{
    nr=0;
    for (; S[k]<'0' || S[k]>'9'; k++)
        if (k==S_MAX-1)
        {
            fread(S,1,S_MAX,stdin);
            k=-1;
        }

    for (; S[k]>='0' && S[k]<='9'; k++)
    {
        nr=10*nr+S[k]-'0';
        if (k==S_MAX-1)
        {
            fread(S,1,S_MAX,stdin);
            k=-1;
        }
    }
}

int main()
{
    int i,n;
	freopen("algsort.in","r",stdin);
	freopen("algsort.out","w",stdout);
	fread(S,1,S_MAX,stdin);
	read(n);
	for (i=1; i<=n; i++)
        read(A[i]);
    sort(1,n);
    for (i=1; i<=n; i++) printf("%d ",A[i]);

    return 0;
}