Cod sursa(job #2942999)

Utilizator biancaivascuBianca Ivascu biancaivascu Data 20 noiembrie 2022 14:12:26
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.73 kb
#include <iostream>
#include <fstream>

using namespace std;

#define MaxN 500000

int v[MaxN];

void qsort(int st, int dr) {
    int p=v[st+rand()%(dr-st+1)];
    int b=st, e=dr;
    while(v[b]<p)
        b++;
    while(v[e]>p)
        e--;

    while(b<e) {
        swap(v[b], v[e]); b++; e--;
        while(v[b]<p) b++;
        while(v[e]>p) e--;
    }

    if(e>st)
    {
      qsort(st, e);
    }
    if(e+1<dr)
    {
      qsort(e+1, dr);
    }
}
int main() {
    ifstream in("algsort.in");
    ofstream out("algsort.out");
    int n, i;
    in>>n;
    for(i=0; i<n; i++) {
        in>>v[i];
    }

    qsort(0, n-1);
    for(i=0; i<n; i++)
    {
      out<<v[i]<<" ";
    }
    return 0;
}