Cod sursa(job #1335559)

Utilizator alexpetrescuAlexandru Petrescu alexpetrescu Data 5 februarie 2015 18:13:08
Problema Sortare prin comparare Scor 100
Compilator c Status done
Runda Arhiva educationala Marime 0.93 kb
#include <stdio.h>
#include <stdlib.h>
#define MAXN 500000
int v[MAXN];
void myQuickSort(int st, int dr){
    int pivot=v[st+rand()%(dr-st+1)], i=st, j=dr, aux;
    while(i<=j){
        while(v[i]<pivot){
            i++;
        }
        while(v[j]>pivot){
            j--;
        }
        if(i<=j){
            aux=v[i];
            v[i]=v[j];
            v[j]=aux;
            i++;
            j--;
        }
    }
    if(st<j){
        myQuickSort(st, j);
    }
    if(i<dr){
        myQuickSort(i, dr);
    }
}
int main(){
    int n, i;
    FILE *fin, *fout;
    fin=fopen("algsort.in", "r");
    fout=fopen("algsort.out", "w");
    fscanf(fin, "%d", &n);
    for(i=0; i<n; i++){
        fscanf(fin, "%d", &v[i]);
    }
    myQuickSort(0, n-1);
    for(i=0; i<n-1; i++){
        fprintf(fout, "%d ", v[i]);
    }
    fprintf(fout, "%d\n", v[i]);
    fclose(fin);
    fclose(fout);
    return 0;
}