Cod sursa(job #2111551)

Utilizator MaligMamaliga cu smantana Malig Data 22 ianuarie 2018 12:00:02
Problema Sortare prin comparare Scor 80
Compilator cpp Status done
Runda Arhiva educationala Marime 1.23 kb
#include <bits/stdc++.h>

#if 1
#define pv(x) cout<<#x<<" = "<<x<<"; ";cout.flush()
#define pn cout<<endl
#else
#define pv(x)
#define pn
#endif

using namespace std;
ifstream in("algsort.in");
ofstream out("algsort.out");

using ll = long long;
using ull = unsigned long long;
using uint = unsigned int;
#define pb push_back
#define mp make_pair
const int NMax = 5e5 + 5;
const int inf = 1e9 + 5;
using zint = int;

int N,M;
int v[NMax];

int part(int,int);
void qsort(int st, int dr) {
    if (st >= dr) {
        return;
    }

    int q = part(st,dr);
    qsort(st,q-1);
    qsort(q+1,dr);
}

int part(int st, int dr) {
    int idx = rand() % (dr-st+1) + st;

    int i = st, j = dr;
    while (i < j) {
        while (j != idx && v[idx] <= v[j]) {
            --j;
        }
        swap(v[j],v[idx]);
        idx = j;

        while (i != idx && v[i] <= v[idx]) {
            ++i;
        }
        swap(v[i],v[idx]);
        idx = i;
    }

    return i;
}

int main() {
    in>>N;
    for (int i=1;i <= N;++i) {
        in>>v[i];
    }

    srand(time(0));
    qsort(1,N);

    for (int i=1;i <= N;++i) {
        out<<v[i]<<' ';
    }

    in.close();out.close();
    return 0;
}