Cod sursa(job #2278043)

Utilizator badea_adi1999Badea Adrian Catalin badea_adi1999 Data 7 noiembrie 2018 10:41:02
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.71 kb
#include <cstdio>
#include <algorithm>
#define nmax 500005
using namespace std;
FILE *f= fopen("algsort.in", "r");
FILE *g =fopen("algsort.out", "w");
int v[500001];

void qs(int p, int q)
{
    int st=p, dr=q, x=v[(st+dr)>>1];
    do {
        while (st<q && v[st]<x)
            st++;
        while (dr>p && v[dr]>x)
            dr--;
        if (st<=dr) {
            swap(v[st],v[dr]);
            st++;dr--;
        }
    }while (st<=dr);

    if (p<dr) qs(p,dr);
    if (st<q) qs(st,q);
}

int main()
{
    int n,i,j;
    fscanf(f, "%d", &n);
    for (i=1; i<=n; i++)
        fscanf(f, "%d", &v[i]);
    qs(1,n);
    for (i=1; i<=n; i++)
        fprintf(g, "%d ",v[i]);
    return 0;
}